Europe’s Sovereign Debt Can’t Keep Going Up Forever

Time and again, Europe’s leaders have pledged to address a looming threat to their union: excessive government debt. Yet time and again, events — first the pandemic, now a war-related energy shock — have undermined their plans, making the problem larger.

This can’t go on forever. At some point, a major government will probably end up insolvent. The European Union needs to be much better prepared than it is.

When divergent economies share a currency without sharing coffers, imbalances invariably arise. German exports and savings, for example, give rise to debts in other countries. A decade ago, such imbalances — together with official mismanagement — resulted in a Greek financial debacle that nearly tore the euro area apart and imposed suffering on millions of people. But instead of addressing the root of the problem by forming a fiscal union, Europe’s leaders reiterated an old pledge: Over time, they would seek to reduce government debts to a safer level.

No such luck. Amid emergency spending to ease the pandemic and blunt the effects of volatile energy prices, debt burdens have headed mainly in the opposite direction. As of 2021, the combined gross debts of euro-area governments stood at 95% of gross domestic product, up from 86% in 2010 and well above the agreed target of 60%.

So is another crisis coming? That will depend on whether investors think European governments can get their debt-to-GDP ratios under control. To some extent, this year’s inflation surge will help, by increasing the denominator. But rising interest rates will make it difficult to keep the numerator from racing ahead.