# Germany Just Broke the EU’s Firewall

A conversation between Yanis Varoufakis and Wolfgang Münchau reveals how Berlin’s fiscal about-face is rewriting the rules of Europe—and why the bond markets may be the only referee left.

For years, the European Union’s fiscal architecture rested on a simple promise: no member state would be allowed to rack up debt without consequence, and no common fund would be created to bail out profligate governments. That promise is now in tatters. In a striking reversal, Germany—the very country that policed this orthodoxy—has opened the door to joint European borrowing on a scale that would have been unthinkable just months ago. The move does not merely bend the rules; it breaks the firewall that separated national budgets from collective liability.

The shift came into focus during a recent discussion between Yanis Varoufakis, the former Greek finance minister, and Wolfgang Münchau, a veteran economic commentator. Their exchange, part of the Econoclasts series, dissects how Berlin’s decision to fund a massive defense and infrastructure package through common debt instruments has effectively torn up the EU’s fiscal rulebook. What follows is a synthesis of their key arguments, stripped of jargon and political spin.

The End of the German Taboo

Germany has long positioned itself as the guardian of fiscal discipline. Its constitutional debt brake, enshrined in law, limited federal borrowing to a tiny fraction of GDP. Berlin insisted that each country must clean up its own balance sheet. Any suggestion of mutualized debt—often called “Eurobonds”—was dismissed as a moral hazard that would let spendthrift governments off the hook.

That stance has collapsed. Faced with sluggish growth, an energy crisis, and the need to rearm in the face of Russian aggression, the German government announced a sweeping plan to borrow hundreds of billions of euros collectively. The money will fund defense procurement and critical infrastructure, but the mechanism bypasses the usual national vetoes. In effect, Germany has authorized the European Commission to issue common debt on behalf of all member states, with the costs shared according to a formula that spreads the burden.

Varoufakis calls this a “revolution from above.” Münchau is more blunt: “The firewall is gone.” The firewall was the principle that each state’s debts were its own problem. Once you allow joint borrowing for one purpose, you cannot easily prevent it from being used for others. The precedent is set.

Why Now?

Three forces converged to force Berlin’s hand. First, the war in Ukraine exposed Europe’s military inadequacy. Germany, in particular, had underinvested in defense for decades. Rebuilding its armed forces requires money it does not have within its current fiscal rules. Second, the green transition demands enormous public investment in grids, renewables, and industrial retooling. Third, the rise of protectionist policies in the United States and China has put European exporters under pressure, making government support for strategic industries politically palatable.

Münchau notes that the German public, once fiercely opposed to any form of debt mutualization, has largely accepted the new reality. The alternative—watching German industry wither and security crumble—appeared worse. “The politics changed faster than the economics,” he says. “The old certainties are gone.”

Who Pays, Who Benefits?

The common debt will be repaid from the EU budget, which is financed by contributions from member states and new EU-level taxes. In practice, this means wealthier countries like Germany will shoulder a larger share of the interest burden, while poorer countries gain access to cheap financing they could never obtain on their own. That is precisely what critics of Eurobonds warned about: a permanent transfer union.

Varoufakis argues that this outcome was inevitable. A monetary union without a fiscal union, he says, is inherently unstable. When crises hit, the center must either let peripheral economies collapse or mutualize their debts. Europe chose the latter—not out of solidarity, but out of self-preservation. “The center cannot survive if the periphery implodes,” he explains. “So the center pays.”

Yet the arrangement is far from transparent. The debt is being issued through complex off-budget vehicles, making it difficult for national parliaments to scrutinize. Münchau warns that this lack of democratic oversight could fuel populist backlash. “You cannot build a lasting fiscal union in the dark,” he says.

The Bond Market as Referee

Perhaps the most striking observation from the discussion is that the bond market, not voters or parliaments, is now the ultimate arbiter of European fiscal policy. When the European Central Bank signaled it would backstop the new debt, yields on peripheral bonds fell. When doubts emerged about the scale of German support, spreads widened. Financial markets are pricing in the likelihood that the EU will eventually assume responsibility for all member states’ debts, regardless of treaties.

This market-driven integration is a double-edged sword. On one hand, it provides the liquidity needed to fund public investment. On the other, it subordinates democratic choice to the whims of traders. Varoufakis points out that the same markets that forced austerity on Greece are now forcing integration on Germany. “The irony is thick,” he says. “The discipline they imposed on us is now being applied to them.”

What Comes Next?

The immediate question is whether the new borrowing will be enough. The sums discussed—hundreds of billions of euros—are large, but the needs are larger. Defense alone could consume a trillion euros over a decade. Climate adaptation and industrial policy will demand more. If the common debt facility proves insufficient, pressure will grow to expand it, perhaps permanently.

A second question is legal. The EU treaties explicitly prohibit the union from assuming member states’ debts. The new mechanism skirts this prohibition by using the EU budget as collateral and labeling the spending as “common goods.” Legal challenges are likely, particularly from Germany’s own constitutional court. If the court rules against the scheme, the entire structure could collapse.

Münchau believes the treaties will be amended—or simply ignored. “When the survival of the project is at stake, lawyers become creative,” he says. Varoufakis is more pessimistic. He predicts a cycle of crisis, improvisation, and further integration, each step taken without public consent. “Europe is being rebuilt by stealth,” he warns. “And one day, the people will notice.”

The Firewall’s Afterlife

The EU’s fiscal firewall was never just a set of rules. It was a political statement: that national sovereignty over budgets was non-negotiable. By breaking that firewall, Germany has acknowledged that sovereignty is no longer absolute. In its place stands a fragile, market-mediated compromise—one that keeps the euro alive but leaves democracy trailing behind.

Whether this marks the birth of a genuine fiscal union or merely another temporary fix remains to be seen. What is clear is that the old order is gone. The firewall has fallen, and no one is rushing to rebuild it.