whether the gained wealth from exploitation of people outside of USA allowed more mobility between wealth classes inside of USA - that would be a complicated discussion for me

I was merely pointing out the fact that it was possible to ascent to higher wealth class in USA with regular 'honest work' some years ago, whereas in Europe this is in general impossible due to taxation schemes designed to suck the life out of anyone who decides to work as opposed to being born an 'aristocrat' inheriting money, land etc...