this is one of the reasons why european nations drag their legs on the NATO 2% GDP commitment, because all the money goes to the US anyway, imagine levying a 2% GDP tax on all your allies
Demanding that everyone spend 2% of GDP on defence effectively amounts to demanding that everyone give the US 1.32% of their GDP for nato membership. It's like a supreme vassalisation fee paid to america.
The funny thing is that the 2% goal isn't even binding. It's been claimed that it is by the media and government, because it aligns with the state's goals, but it's basically militaristic propaganda.