Constitutional Debt Brake and the Supreme Court’s Ruling on Non-Performing Loans

The recent plenary decision of Greece’s Supreme Court (Areios Pagos) on interest accrual for loans restructured under Law Katseli has triggered a ‘liberation earthquake’ for thousands of households with regulated loans. Simultaneously, it raised a critical question: who will cover the ~€1.1 billion shortfall at the foundation of the ‘Hercules’ securitization program? While offering social relief from a legacy wound inflicted by the memoranda, the ruling also underscores that the non-performing loan problem was never fully resolved by Hercules. With ECB backing (guaranteeing Greek bonds) and state guarantees, financial investors were invited to purchase distressed loans at steep discounts—yet assured strong rights over both interest payments and underlying real estate collateral. The Court’s decision effectively rendered thousands of restructured loans interest-free, opening a backdoor that may activate state guarantees. This episode appears to explain the government’s urgency to introduce a constitutional ‘debt brake’ during the ongoing constitutional reform. Though not modeled on Germany’s version, the proposed clause would embed fiscal discipline into the Constitution—potentially enabling challenges to judicial or administrative decisions imposing significant fiscal costs that widen deficits and inflate public debt. In essence, the government seeks an existential safeguard: binding future administrations—and courts—to strict fiscal orthodoxy, much like Odysseus lashing himself to the mast against the Sirens’ call. The deeper aim is clear: immunizing the budget permanently against future court rulings or social pressures arising from austerity’s lingering harms—or new demands. It also signals to markets that fiscal stability is no longer a transient political choice but a constitutional imperative. Yet a major unresolved question remains: can such an a priori fiscal straitjacket withstand the strains of future crises—especially amid Europe’s deepening energy, fiscal, and geopolitical challenges?