Spain Proposes Massive European Debt Amid NATO Rearmament Pressure

Brussels is once again facing its favourite contradiction: it wants to spend like a power, but it does not know who should pay the bill.

Spain is set to propose at Thursday’s Eurogroup meeting the creation of a European mechanism empowered to issue up to €850 billion in joint debt annually.

The initiative, backed by Finance Minister Carlos Cuerpo, would centralise a portion of national sovereign debt issuance under the European Commission. The Commission would then issue EU bonds and channel the proceeds to member states as loans.

If all members took part, the accumulated volume could reach €5 trillion in five years, the threshold Madrid considers necessary to create a major safe asset in euros.

Formally, Spain insists that this would not mean creating more aggregate debt, but rather reorganising existing issuance. Yet the political justification is obvious. It is one thing for each state to answer to the markets for its own debt. It is quite another to build a permanent architecture of common debt ultimately backed by the European budget. In other words, by European taxpayers.

The timing is not accidental. Berlin has just rejected an increase in the 2028-2034 Multiannual Financial Framework (MFF) and is demanding around €400 billion in cuts to an EU proposal close to €2 trillion. Germany, the bloc’s largest net contributor, considers the size of the next European budget “unaffordable” and warns that there will be no agreement if Brussels maintains those figures.

If the ordinary budget hits the German wall, Brussels will look for other channels. Common debt is the perfect shortcut: it is not presented as direct budgetary spending, but as a market instrument, a tool for strategic autonomy, and a way to strengthen the international role of the euro. In practice, it opens a parallel route to finance political priorities without subjecting them to the same budgetary debate.

What could that financial capacity be used for? The Spanish proposal does not officially link it to any specific item, but the context points clearly to defence, Ukraine, the military industry, critical infrastructure, cybersecurity, and the industrial transition associated with rearmament. NATO has just closed a summit in Ankara marked by pressure to increase military spending, with allies reviewing progress towards the target of 5% of GDP on defence by 2035 and committing €70 billion in military support, assistance and training for Ukraine in 2026, with equivalent levels in 2027.

The key question, therefore, is not only financial. It is institutional. Europe says it needs security, autonomy and geopolitical muscle. But instead of first deciding which powers each nation retains and which costs each parliament accepts, it once again builds the mechanism before securing the democratic mandate.

If the figure of €850 billion a year materialises, this would not be a technical adjustment of the debt market. It would be a transformation of European fiscal sovereignty through the back door. Once again.