>quality of life, and wealth.

Can you elaborate more on how invasion of Iraq helped in increasing quality of life for an average citizen?

Try not to pick on specific instances for the sake of argument. US military power and it's geopolitical position, combined with a bunch of other things made dollar the reserve currency. Fed is printing money yet there is no inflation except asset inflation. Noone can threaten us military, hence we will be for foreseeable future the country people will pour money on.