It is not usual for an ally to critique the top hegemon

But here we have exactly such an event:

http://en.people.cn/n3/2017/0731/c90777-9249133.html

The question is whether the German Economics minister is accurate in her legal foundation to assert her criticism or she is not.

If she is, as an American taxpayer, you have to wonder what is the warped thinking of the legislators who are in the Congress.