Rising Inequality May Push Countries to Sustain Higher Sovereign Debt, IMF Study Says

An IMF study finds that governments often sustain high sovereign debt because international borrowing helps finance income redistribution without relying heavily on distortionary taxes. The research shows that higher inequality increases the incentive to maintain external debt rather than default, since losing access to borrowing would make redistribution more costly.

Researchers at the International Monetary Fund’s Research Department have proposed a new explanation for why many countries continue to carry large amounts of sovereign debt. In a recent IMF working paper, economist Monica Tran-Xuan suggests that government borrowing is not only about stabilizing economies during crises. Instead, it can also help governments manage the economic costs of redistributing income in societies where inequality is rising. The research highlights how inequality and sovereign debt may be more closely connected than previously thought.

Over the past few decades, many economies have experienced a simultaneous rise in income inequality and external debt levels. Governments often respond to economic downturns or fiscal stress with austerity measures such as tax increases or spending cuts. However, these policies can disproportionately affect poorer households. As a result, policymakers face a difficult challenge: maintaining stable public finances while also protecting vulnerable groups through redistribution.

How Redistribution Creates Economic Challenges

In most economies, governments redistribute income through taxation and public spending. Taxes collected from higher-income households help fund social programs that benefit lower-income groups. While these policies can reduce inequality, they can also create economic distortions.

The study explains that redistribution often relies on labor taxes, which may discourage people from working as much as they otherwise would. When taxes become too high, they can reduce productivity and overall economic output. This means that while redistribution helps reduce inequality, it also carries economic costs.

Governments must therefore balance two competing goals. On one hand, they want to redistribute income to support lower-income citizens. On the other hand, they must avoid excessive taxation that could slow economic growth.

Why Borrowing Helps Governments Redistribute

According to the IMF research, international borrowing offers governments a way to ease this trade-off. By borrowing from global financial markets, governments can finance redistribution programs without relying entirely on higher taxes in the short term.

In simple terms, borrowing allows governments to spread the cost of redistribution over time rather than placing the full burden on taxpayers immediately. This reduces the economic distortions caused by heavy taxation and helps maintain economic activity.

This mechanism helps explain why many countries continue to borrow even when debt levels appear high. Access to international credit markets provides flexibility that allows governments to pursue social policies while maintaining economic stability.

Why Countries Avoid Defaulting

The research also sheds light on why governments often choose to repay their debts instead of defaulting, even during difficult economic periods.

When a country defaults on its debt, it typically loses access to international financial markets. This situation, known as financial autarky, prevents the government from borrowing abroad. Without access to external credit, the government must rely entirely on domestic taxes to fund spending and redistribution.

This can make redistribution much more expensive. To maintain social programs, governments may have to increase labor taxes significantly. Higher taxes can reduce employment, lower output and worsen economic conditions. Because of these negative effects, default becomes costly.

As a result, governments may decide that continuing to repay debt is preferable to losing access to international borrowing.

Inequality and Debt Are Closely Linked

One of the most important findings of the study is that countries with higher inequality may sustain higher levels of debt. In more unequal societies, governments face stronger pressure to redistribute income. Since redistribution through taxation is costly, borrowing becomes an attractive option.

The study suggests that international borrowing helps governments maintain redistribution policies while limiting the economic damage caused by higher taxes. Because default would eliminate this option, governments in unequal societies have stronger incentives to keep repaying their debts.

To test this idea, the research examines economic data from Italy, a country that has experienced rising inequality and significant public debt. The model developed in the study successfully replicates key features of the Italian economy and shows that redistribution plays a major role in explaining its long-term debt levels.

Implications for Economic Policy

The findings offer new insights for policymakers dealing with rising inequality and fiscal pressures. The study suggests that sovereign debt should not be viewed only as a macroeconomic tool for managing recessions or stabilizing economies. It may also serve as a way for governments to support redistribution while minimizing economic distortions.

The research also indicates that fiscal adjustments during economic crises may need to be gradual rather than immediate. Governments may initially increase borrowing to protect households from economic shocks and then slowly adjust taxes and spending over time to stabilize debt.

Overall, the study provides a broader understanding of sovereign debt dynamics. It highlights how inequality, redistribution and borrowing interact to shape government fiscal decisions. As debates over inequality and public debt continue worldwide, this new perspective offers a clearer picture of why many countries maintain high levels of sovereign borrowing while still avoiding default.