This paper aims to show how state intervention within the European Monetary Union can have positive effects not only on growth but also on public balances and debt. The relation between centralized monetary policy and decentralized fiscal policy partly solves the lack of coordination between the two. Each time a fiscal expansion in an EU country is not accompanied by a Central Bank interest rate increase, the expansionary effect of public spending, initially financed through the emission of public bonds, will be reinforced by endogenous money creation due to the increase in growth. The final result, if growth exceeds the rate of interest, is not only an increase in equilibrium income, but also a reduction in debt.