From the Seventies to the Superbonus 110%: how much have Italy’s major political choices of the past fifty years cost?

Public debt also tells the story of our political choices

When I look at Italian public debt, my first question is how we got here. Behind that figure are laws passed, retirement arrangements approved, businesses rescued, incentives introduced and reforms postponed. My argument is that Italy’s debt has deeply political origins: for decades we decided how to distribute resources and benefits while accepting that part of the bill would be passed into the future. Discussing only markets, spreads or European constraints leaves out precisely this responsibility.

Economic crises, interest rates and growth have certainly mattered. Yet a country’s ability to withstand a crisis also depends on the condition in which it enters it. A budget already burdened by permanent commitments leaves less room to invest or respond to an emergency. Choosing to postpone a correction when the problem is known is itself a political decision with economic consequences.

I do not regard all public expenditure as waste: healthcare, education and infrastructure can generate benefits far greater than their cost. What interests me is understanding what results we bought with debt and which alternatives we sacrificed. To do so, I will use documented data, numerical examples and explicit assumptions. Opportunity cost can be estimated: we need to construct an alternative scenario and show the calculations, without presenting a simulation as an invoice already paid.

1. The Seventies: expanding public expenditure and the origins of imbalances

The Seventies marked a fundamental turning point in Italian economic history. The country had experienced the so-called economic miracle, during which industrialisation and productivity growth supported a substantial improvement in living standards. However, the oil crisis of 1973, followed by that of 1979, sharply increased energy costs and contributed to stagflation, a situation combining high inflation with weak economic growth.

In this context, Italian governments continued to expand public expenditure, supporting workers’ incomes, developing the pension system and strengthening social services. However, rising expenditure was not matched by a corresponding structural increase in tax revenue. According to the Bank of Italy’s historical reconstructions, the public-debt-to-GDP ratio rose from around 40% in 1970 to close to 100% in 1990. This created imbalances that would influence economic policy for decades.

“Baby pensions”: working for a few years and receiving a pension for decades

Among pension measures introduced in the Seventies, one of the best-known cases concerns the so-called baby pensions, associated with early retirement arrangements for certain categories of public employees. Under the framework governed by Presidential Decree no. 1092 of 1973, some female central-government employees meeting specific family requirements could retire after around 14 years, 6 months and one day of qualifying service. Other categories of public employees faced different, generally higher requirements. As a result, some workers could leave service at a relatively young age and subsequently receive a pension for a very long period.

To understand the financial implications, imagine an employee who starts working at 20 and manages to retire at 40. If they received an annual pension of 18,000 euros for forty years, the nominal total of the payments would be:

18,000 × 40 = 720,000 euros.

This is a purely illustrative example that does not account for inflation, indexation, contributions paid or the time value of money. The economic problem arises when the present value of pension benefits significantly exceeds that of the contributions intended to finance them. In Italy’s pension system, which is predominantly pay-as-you-go, contributions from active workers finance current pensions. Particularly favourable retirement conditions can therefore transfer part of the cost to subsequent generations. Pension reforms in the Nineties and the following decade progressively changed these mechanisms, but the effects of previous rules continued over time.

1978 and the creation of the National Health Service

Not all major public expenditure in the Seventies involved cash transfers. Law no. 833 of 23 December 1978 established the Servizio sanitario nazionale (SSN), Italy’s National Health Service, based on protecting health as a fundamental individual right and a collective interest. The reform helped replace the previous mutual insurance system, in which access to healthcare and the conditions of provision depended more heavily on employment and social insurance status. Public healthcare subsequently became a structural component of Italian expenditure.

Its cost must nevertheless be assessed alongside its benefits: access to treatment, disease prevention, reduced health risks and improved collective well-being. This example shows why an increase in public spending cannot automatically be equated with wasted resources.

This is where, in my view, political responsibility becomes clear: granting a permanent benefit without providing sufficient revenue also commits future taxpayers. The creation of the SSN and early retirement arrangements cannot be judged in the same way, because their purposes and benefits differ. Yet both must answer the same question: how do we finance over time what we promise today? Political support is gained when the benefit is granted; the cost can remain in public accounts long after that government has left office.

2. 1981: the “divorce” between the Treasury and the Bank of Italy

In 1981 a fundamental change occurred in public debt management. Until then, under the system in force, the Bank of Italy was required to buy Treasury bills left unsold at auctions. The so-called divorce between the Treasury and the Bank of Italy, promoted by Treasury Minister Beniamino Andreatta and Governor Carlo Azeglio Ciampi, ended this automatic mechanism. The central bank gained greater autonomy in monetary policy decisions. The aim was to combat inflation and prevent the financing needs of public expenditure from automatically expanding the money supply.

The change had important consequences. The government had to rely more on market conditions to place its debt, while restrictive monetary policy helped bring inflation down. At the same time, rising real interest rates, together with persistently high government deficits, contributed to increasing debt. One oversimplification must be avoided: the divorce alone did not cause the explosion of Italian public debt. Several factors were involved, including the failure to correct imbalances between revenue and expenditure.

The debt-to-GDP ratio, which stood at around 57% in 1980, reached approximately 94% in 1990 in the historical series cited here. The experience of the Eighties shows that financial sustainability depends not only on financing costs but also on a government’s ability to control deficits and support economic growth.

The political lesson I draw is specific: changing financing conditions without sufficiently adjusting the budget exposes a country to a growing bill. Central bank independence served an important purpose, but it did not replace the Government’s and Parliament’s responsibility for financing their decisions. Attributing everything to a monetary decision avoids the more uncomfortable question: which spending choices, revenues and reforms would have been needed to make that transition sustainable?

3. 1987: Chernobyl and the abandonment of nuclear power generation

One of the most significant decisions in Italian energy history was the withdrawal from nuclear electricity generation. Before 1987, Italy had developed its own nuclear programme, with plants built at Latina, Garigliano, Trino and Caorso. The Chernobyl disaster of 26 April 1986 profoundly changed public perceptions of the risks associated with this technology. In November 1987, Italians voted on three referendum questions concerning specific provisions relating to nuclear energy.

One historical point deserves particular attention: the referendums did not directly introduce a general ban on nuclear power generation. Instead, they repealed provisions concerning, among other matters, plant siting, payments to affected local authorities and ENEL’s participation in nuclear projects abroad. Subsequent political and industrial decisions led to the progressive abandonment of domestic nuclear electricity generation. In 2011, a further repeal referendum addressed rules that would have enabled Italy’s nuclear programme to restart.

The opportunity cost of nuclear power: state an assumption and calculate it

I do not share the idea that the absence of an alternative Italy to observe should stop us doing the calculations. A counterfactual estimate is precisely a way to measure what might have happened. I start with an observed figure: according to Terna, electricity demand in 2025 was 311.3 TWh, with 15.1% covered by net imports. I then imagine, as a working assumption rather than a Terna forecast, a system in which nuclear power supplies 20% of that demand. Hypothetical production would be 62.26 TWh, or 62,260,000 MWh per year.

The decisive step is the cost of the electricity displaced. I assume different gaps between the total cost of the alternative mix and nuclear generation: −20, 0, 20 and 40 euros per MWh. These are parameters chosen for this sensitivity analysis, not certified prices or estimates attributed to the sources. Nuclear cost must include construction, financing, operation, fuel, waste and decommissioning; comparison with the alternative mix must also include the relevant system costs. A positive gap indicates a nuclear advantage, while a negative gap indicates an additional cost.

Hypothetical annual benefit = 62,260,000 MWh × cost difference per MWh. I hold production and the cost difference constant in real terms for 30 years, with the fleet already operational. To compare future flows, I also use a real discount rate of 3%, assumed for the calculation. Present value is the sum of discounted annual benefits: the corresponding factor is approximately 19.60.

With a cost advantage of 20 euros per MWh, the hypothetical benefit would therefore be around 1.25 billion euros annually; doubling the advantage would raise it to around 2.49 billion euros. The adverse case instead shows that excessive construction or financing costs can reverse the result. This is a steady-state simulation, not the established historical cost of the 1987 withdrawal: reconstructing the latter would require a plant commissioning schedule, annual costs and production, construction times and consistent alternative scenarios. Nor am I attributing all imports to the abandonment of nuclear power.

I believe that abandoning the development of this option carried a strategic cost because it narrowed the alternatives available to the country. These calculations show how to test the economic scale of that assessment without assuming the result must be positive. A benefit to the economy does not automatically equal a reduction in public debt: it could accrue to businesses and households, while the budgetary impact would depend on tax revenues, subsidies, plant ownership and investment financing. Political responsibility also means assessing these alternatives before giving them up.

4. The Nineties: the debt crisis, privatisations and the bank deposit levy

Italy’s financial situation was particularly difficult in the early Nineties. High indebtedness, currency-market instability and public finance difficulties required fiscal consolidation measures. In 1992, the government led by Giuliano Amato introduced an extraordinary tax on bank and postal deposits at a rate of 6 per thousand, equivalent to 0.6%. To illustrate the mechanism, a levy of 0.6% on a balance of 10,000 euros would amount to 60 euros. This example is naturally expressed in today’s currency, whereas the lira was still in circulation in 1992. The measure aimed to raise resources quickly to restore public finances and was subsequently examined by the Constitutional Court.

At the same time, a major wave of privatisations began. The government sold stakes in numerous businesses, including companies operating in telecommunications, infrastructure, steel and services. Financially, privatisation can generate one-off revenue through the sale of shareholdings. However, it also involves partly or entirely foregoing future dividends and certain control rights. The net benefit therefore depends on the sale price, the company’s economic prospects, how the proceeds are used and the effects on competition. Once again, assessing the transaction solely by its initial proceeds would be insufficient.

The deposit levy illustrates a mechanism I consider central: when restoring balance is postponed, the correction can reach citizens abruptly. Selling public assets is also a political choice. Assessing it requires the sale price and the return forgone, together with the cost of any debt repaid. The question is not whether privatisation is always right or always wrong, but whether that particular transaction genuinely improves the government’s economic position.

5. Major infrastructure: the case of Venice’s MOSE

Another significant category of political decisions concerns major infrastructure projects. One Italian example is MOSE, the system of movable barriers designed to protect Venice and its lagoon from exceptional tides. Developed through a decision-making and construction process spanning several decades, the project required substantial resources. According to a reconstruction published by Pagella Politica in 2022, construction costs had reached approximately 6.2 billion euros, with operating and maintenance expenditure to be considered separately.

The project’s economic importance cannot, however, be assessed solely through its construction cost. A tidal barrier provides a benefit when it prevents damage to buildings, infrastructure, businesses and historical heritage. Its value therefore also depends on the reduction in expected damage over its useful life. MOSE illustrates the role of cost-benefit analysis, a method used to compare the total costs of a public project with the economic and social benefits it can generate.

6. Alitalia: the costs of public support for businesses

Over recent decades, part of public resources has been used to support businesses considered strategically important to the national economy. A particularly controversial case is Alitalia. The airline experienced repeated industrial and financial crises accompanied by government interventions, recapitalisations and loans. According to a reconstruction by the Italian Public Accounts Observatory at Università Cattolica, the cumulative net burden on taxpayers was estimated in 2017 at approximately 9.4 billion euros.

Further financing was subsequently considered, including bridging loans granted in 2017 and 2019, with a combined nominal value of around 1.3 billion. Including unpaid interest, the Observatory estimated the burden associated with these loans at around 1.6 billion. These amounts belong to a specific economic reconstruction and do not automatically represent the definitive overall cost of all government interventions in the sector.

Why does a government decide to rescue a company?

There can be several reasons: protecting employment, ensuring essential services continue, safeguarding an industrial supply chain or preventing the adverse economic effects of abrupt liquidation. Conversely, support for structurally loss-making businesses can weaken incentives for industrial restructuring and absorb resources that could be used elsewhere. Economics describes a soft budget constraint as a situation in which a company expects outside assistance if it cannot cover its costs independently. This is a particularly important risk in managing state-owned enterprises.

In my view, calling a business “strategic” does not solve the problem of its financial viability. Every rescue should have measurable objectives, deadlines and a limit on committed public money. Opportunity cost is tangible: resources used to cover losses cannot simultaneously finance other activities or reduce debt. Protecting workers is a legitimate objective, but it should also be compared with alternative protection and re-employment measures.

7. The financial crises of 2008 and 2011

The international financial crisis of 2008, which began in the United States and spread worldwide, caused a sharp contraction in economic activity. Its effects were significant for Italy, which already had high public debt and modest economic growth. Falling GDP also increased the debt-to-GDP ratio through a simple mathematical mechanism: when the denominator falls, the debt ratio rises, even if nominal debt remains unchanged.

In 2011, during the euro-area sovereign debt crisis, pressure on Italian government bonds increased the yields demanded by investors. In this context, Mario Monti’s government adopted the pension reform commonly known as the Fornero reform, which changed retirement eligibility requirements and strengthened the contribution-based benefit calculation system. Its consequences differed across generations and categories of workers.

Financially, tighter retirement requirements were intended to contain pension spending growth over the medium to long term. Socially, however, the reform extended working lives for many people and required subsequent safeguarding measures for particular groups. This episode shows how a reform can improve a system’s financial sustainability while simultaneously creating adjustment costs for some citizens.

8. 2019: Reddito di cittadinanza and Quota 100

Two measures with significant implications for Italian public finances were introduced in 2019: Reddito di cittadinanza and Quota 100. Although approved in the same period, the policies pursued different objectives.

Reddito di cittadinanza

Reddito di cittadinanza was introduced as an anti-poverty benefit combined with mechanisms intended to support labour-market reintegration. It targeted households meeting specific income and asset requirements. According to INPS, total expenditure on Reddito di cittadinanza and its pensioner counterpart, Pensione di cittadinanza, exceeded 34.5 billion euros between April 2019 and December 2023.

Economic assessment of the measure requires distinguishing at least two outcomes. The first is its ability to support poor households’ disposable income and alleviate economic deprivation. The second concerns employment, labour-market participation and the effectiveness of training and job-search support policies. A measure can achieve redistributive results even when its employment outcomes fall short of initial objectives. During the transition to the new system, Supporto per la formazione e il lavoro (training and employment support) was introduced in September 2023 and Assegno di inclusione (inclusion allowance) in January 2024, after Reddito di cittadinanza ended.

Quota 100

Quota 100 allowed workers who had reached at least 62 years of age and 38 years of contributions by 2021 to retire, subject to the other applicable requirements. It provided an additional early retirement route alongside ordinary pension arrangements. A joint INPS and Parliamentary Budget Office analysis published after the first three years of implementation estimated expenditure of around 23.2 billion euros over 2019-2025.

It is essential to clarify that this amount was an estimate based on actual data through 2021 and projections for subsequent years, not final outturn expenditure for the entire period. The estimate was below the original appropriations, partly because fewer workers than expected had used the scheme. Economically, early retirement changes the balance between contribution years and years receiving pension payments. The overall public finance effect must also account for any new recruitment, contribution and tax revenue, and the behaviour of workers and businesses.

These figures show why I consider a discussion focused only on a measure’s popularity inadequate. Bringing retirement forward and tackling poverty are different political priorities, competing with other uses of resources. Expenditure does not automatically become debt in its full amount: its financing and effects on revenue and economic activity matter. Yet introducing, maintaining or correcting it remains the responsibility of those who govern, to be judged on results as well as intentions.

9. 2020: the Superbonus 110% and the transformation of tax deductions

Among the economic policies introduced during the pandemic, the Superbonus 110% stands out for its financial scale and design. Introduced by Decree-Law no. 34 of 19 May 2020, it initially provided, subject to statutory conditions, a tax deduction equal to 110% of eligible expenditure on specified building works. Its objectives were to support economic activity during the pandemic crisis, stimulate construction investment and improve buildings’ energy efficiency and earthquake resistance.

Its most notable feature was that the benefit could exceed the taxpayer’s expenditure. For example, eligible expenditure of 100,000 euros at a rate of 110% could theoretically generate a deduction of 110,000 euros, subject to all requirements and limits. Invoice discounts and tax credit transfers also made the incentive accessible to people who would not have had sufficient tax liability to use the deduction directly.

How much has the Superbonus cost?

ENEA’s monitoring, updated to 30 September 2026 and covering energy-related SuperEcobonus works, reports:

• 126.65 billion euros in total investment;
• 124.87 billion euros in investment eligible for deductions;
• 131.56 billion euros in deductions accrued for completed works, described by ENEA as the burden on the government;
• 502,419 buildings covered by the monitoring.

These different measures must not be confused. Investment represents the value of the works, while accrued deductions measure the tax benefit recognised under the scheme’s rules. The ENEA figures cited here cover SuperEcobonus: they must not be presented as the cost of every other building tax incentive. Moreover, the time when a deduction is recorded in the accounts can differ from the time when it affects Treasury cash resources.

Economic benefits and limitations of the scheme

The Superbonus supported demand for building work, contributing to activity in construction and related businesses. It also financed energy-efficiency improvements with potential benefits for buildings’ future energy consumption. However, economic debate mainly concerns the relationship between public resources used and genuinely additional investment. A Bank of Italy study published in 2024 examining the Superbonus and Bonus facciate together estimated that around one quarter of subsidised investment would have occurred even without the incentives.

This is known as the deadweight effect, meaning public financing of non-additional spending: part of the benefit pays for investment decisions that private parties would have made anyway. It does not necessarily coincide with the displacement of other investment, known as crowding out. The same researchers estimated a fiscal multiplier below one. The fiscal multiplier measures how much economic output increases following additional public spending or a fiscal stimulus. A multiplier below one means that, under the assumptions and over the period studied, the increase in value added is smaller than the cost of the intervention.

Another Bank of Italy study found that the incentives likely contributed significantly to rising construction costs between 2021 and 2023. This highlights a problem in incentive design: when the final beneficiary bears only a very small share of the cost, the incentive to negotiate lower prices may weaken, especially when supply capacity is limited. An overall assessment must nevertheless consider not just immediate GDP effects but also energy savings, environmental benefits and the durability of the improvements.

My criticism concerns above all the political design of the incentive. If spending 100 is rewarded with a tax benefit of 110, price discipline cannot be left to the same mechanisms as a purchase paid entirely by the customer. Limits, checks and an assessment of the return on public spending are needed. Construction activity and incomes generated are outcomes worth considering, but they do not demonstrate that the measure paid for itself: an additional euro of GDP is not an additional euro of tax revenue.

To make this distinction concrete, consider an entirely hypothetical example: an incentive costing 100 billion generates 80 billion of value added, and the public sector recovers 40% as additional revenue. The recovery would be 32 billion, leaving 68 billion before other effects. This is not an estimate of the Superbonus, but a calculation explaining why self-financing must be demonstrated. Those choosing the incentive must explain which benefits justify the remaining cost and who bears it.

10. The pandemic: economic support, guarantees and public debt

During the health emergency of 2020, the Italian government introduced numerous measures to support households, workers and businesses. These included non-repayable grants, wage supplementation, tax relief, loan moratoria and public guarantee schemes. The instruments had different purposes and did not all entail the same expenditure for the public budget.

A non-repayable grant normally represents a transfer of resources, whereas a government loan guarantee primarily creates a contingent liability: the government may have to intervene if the borrower cannot repay. It is therefore incorrect to indiscriminately add the value of guaranteed loans to public transfers. The pandemic nevertheless caused a sharp deterioration in public finances, partly through the contraction in economic activity. In 2020 Italy’s debt-to-GDP ratio reached around 154%, compared with approximately 134% in 2019. The increase reflected a combination of additional financing needs and falling GDP.

The pandemic was an external shock, and supporting the economy was necessary. That does not make all available instruments equivalent. Eligibility, duration, checks and financing were political decisions. My distinction is this: recognising the seriousness of the emergency does not remove the need to assess whether each intervention was proportionate, nor does it automatically justify turning temporary assistance into a permanent commitment.

11. 2022: the energy crisis and the cost of support against higher bills

Russia’s invasion of Ukraine in February 2022 intensified existing tensions in European energy markets. Soaring gas prices fed through into production costs and household and business energy bills. Italy’s significant dependence on fossil fuel imports required numerous support measures. These included business tax credits, reductions in certain energy charges and social bonuses, alongside measures intended to limit the effects of price increases.

For example, the budget law for 2023 allocated more than 18.5 billion euros to measures addressing high energy costs within the scope classified by the Department for the Government Programme. This figure specifically covers the identified appropriations for 2023 and does not represent the total cost of all support approved during the energy crisis. The case illustrates a fundamental link between industrial choices and public budgets. When an energy crisis causes sudden cost increases, governments can intervene to soften the social and economic consequences. These interventions nevertheless require fiscal resources, making the structure of the energy system relevant to public finance sustainability as well.

12. The PNRR: almost 200 billion in European resources, investment and loans

One of the main economic initiatives of the past decade is Italy’s National Recovery and Resilience Plan (PNRR), part of the European NextGenerationEU programme. Following revisions approved at European level, Italy’s plan has a total allocation of approximately 194.4 billion euros, divided into:

• 71.8 billion euros in grants;
• 122.6 billion euros in loans.

Grants are European transfers that Italy does not have to repay directly as a national loan. This does not mean they have no collective cost: European funding entails repayment obligations at Union level. Loans, by contrast, are resources that must be repaid under the agreed terms. The PNRR includes investment in infrastructure, digitalisation, the energy transition, education, healthcare and numerous other areas, together with institutional reforms.

Economically, the central issue is the ability of investment to generate lasting benefits. Building railway infrastructure, for example, entails initial expenditure but can subsequently improve mobility, reduce logistics costs and support production. Similarly, digitalising public administration can improve service quality and reduce administrative costs. However, it is important to distinguish allocated resources, amounts actually disbursed by the European Union and expenditure incurred on individual projects. These are different measures and must not be used interchangeably.

Using the Plan’s rounded amounts, loans represent approximately 63.1% of total resources. This is calculated as 122.6 divided by 194.4, and helps explain why I find generic references to money received from Europe misleading. The political task is to choose projects capable of improving productivity and services while covering their future costs. Spending the entire allocation is not, by itself, proof of success: what matters is what remains for the country after the money is spent.

13. Debt in 2026: yesterday’s decisions constrain today’s possibilities

The Bank of Italy’s publication dated 15 October 2026 reports end-2025 debt of 3,097.093 billion euros, equivalent to 136.7% of GDP, in the revised figures. By August 2026, the stock reaches 3,200.848 billion euros. These observations refer to different dates: the annual ratio must not be attached to the subsequent monthly stock. Changes in debt also include financial transactions and liquidity changes, so they do not automatically equal the deficit.

The deficit is the annual difference between expenditure and revenue; debt is an accumulated stock. Interest connects past and present: resources needed to pay creditors today are unavailable for other uses. To illustrate the mechanism, assume 100 billion of additional debt financed at a constant annual cost of 3%: interest would require 3 billion annually, or 30 billion over 10 years, holding principal unchanged and without compounding interest. This is a worked example, not the actual cost of a specific measure.

The debt-to-GDP ratio also depends on nominal growth and the primary balance, meaning revenue minus expenditure before interest. A primary surplus may be insufficient to reduce the ratio if debt costs exceed growth and other factors are adverse. That is why my political assessment includes both spending decisions and choices affecting the capacity to grow. Leaving little room for productive investment can make even existing debt harder to sustain.

14. An economic overview of the main decisions

The following table summarises some of the measures discussed. The data refer to different periods, instruments and accounting criteria and therefore must not be added together.

15. Political responsibility also lies in the alternatives rejected

The criterion I would use to judge a public decision is simple: what result do we obtain for each euro committed, compared with the available alternative? For income support, I would examine poverty reduction and incentives to work. For pensions, the balance between contributions, benefits and generations. For building incentives, additional investment and the cost of energy saved. For infrastructure, benefits generated over its useful life, including maintenance and delivery times.

This approach also puts a value on opportunities forgone. Opportunity cost is not a number to invent: it is a comparison to construct, with checkable assumptions and favourable and adverse scenarios. Politicians should make that comparison explicit when deciding, not only after the bill arrives. They should explain who receives the benefit, who finances the measure and what burden is left to those who cannot yet vote.

Conclusion: debt is also a political inheritance

My conclusion is that Italian public debt is, to a large extent, the inheritance of political priorities chosen over time. Some were justified and improved people’s lives; others prioritised immediate benefits while postponing questions of financing and results. Recessions and interest amplified the imbalances, but they do not erase the responsibility of those deciding expenditure, revenue, rules and reforms. That responsibility spans different governments and majorities, including those who maintained arrangements they could have corrected.

That is why I find discussions treating debt as distant from concrete decisions unconvincing. Behind it are early pensions, rescues, incentives and investments, with very different effects. There are also sacrificed opportunities for growth and postponed corrections. Politics determines who benefits today and how much room remains for those who come afterwards: this is the connection I believe it is essential to make visible.

I would therefore ask every proposal to provide a precise answer: what does it cost, which benefits does it produce, how is it financed and why is it preferable to the alternatives? Data make those answers verifiable. Explicit assumptions also allow us to assess what did not happen. Debt becomes more understandable when we trace it back to the choices that generated it and the opportunities those choices opened or closed.

Note on sources and calculations: observed amounts are attributed to the sources listed below. Nuclear scenarios and examples of fiscal recovery and interest are illustrative calculations by the author with explicit assumptions. Actual data, estimates and discounted values have different scopes and must not be added together to reconstruct total debt.