You don't seem to speak to a lot of people. The debt break is in high regard in Germany, for very good reasons. Just look at the latest absurd policy suggested by Habeck: a 1000€ voucher for electricity for everyone who buys an electric car. THAT'S the kind of policies which are prevented by a debt break.

The problem is not that the government cannot spend enough. We have higher tax revenues than ever. The problem is that most of the taxes are spent on consumption instead of investments. More money for the government through debts won't necessarily increase investments, but it will 100% increase consumption ever more.

Also, you should look into why the French government collapsed: because their high-debt policies haven't been sustainable.