You might want to consider World-Systems Theory as a good starting point. Workers in the imperial core do not experience the same kind of exploitation as people in the periphery. The USA is a high-income country.

And nothing lasts forever. Nothing is necessarily so. We are in the midst of a massive global paradigm shift. Multipolarity is on the rise. Things are changing everywhere fast.

Settlers by J Sakai is a brilliant expose of American settler-colonial culture and vital history book that attempts to answer this question, but if you decide to give it a read, I would advise you not to draw too many hard and fast conclusions about its contents. Discussions about this book get explosive because they touch on very sensitive racial tensions, and a lot of people get very ridiculous about the whole thing.