Probably the worst problem is
https://en.wikipedia.org/wiki/United_States_debt_ceiling
which is an ordinary law which Congress could repeal but doesn't. It's not as bad of a problem as
https://en.wikipedia.org/wiki/German_balanced_budget_amendme...
given that Germany needs to increase defense spending and modernize it's energy economy... And will have a hard time doing it with the political coalition they have.