The problems the US has with inequality can be laid squarely at the foot of the dollar being the world's reserve currency.
It works like this:
The world uses dollars in international trade.
Who produces the world's dollars? Washington and Wall St. Congress mandates spending, which is funded by the Fed printing money and purchasing bonds. The Fed also controls the money supply via interest rates and fractional reserve banking.
This is a very complicated system, but the end result is the same. Washington and Wall St produce dollars that the world very much wants.
World needs dollars from Washington and Wall St, but Washington and Wall St. need something in return. This ends up being cheap manufactured goods.
The result: dollars and manufacturing jobs get exported abroad, and cheap goods get imported. Washington, Wall St, and their hangers-on (their investments in tech, hollywood, etc) become rich.
The average American gets a bunch of junk in their front yard. They don't work at Bath Iron Works like their grandfather, they get everything they "need" simply by working at 7/11 or as a mortgage broker.
This is easily demonstrated by a wealth of data and theory. You can check out [WTF Happened](https://wtfhappenedin1971.com/) in 1971, see the [Elephant Curve](https://en.wikipedia.org/wiki/The_Elephant_Curve), and see the [Triffin Dilemma](https://en.wikipedia.org/wiki/Triffin_dilemma).
The stuff about taxing the rich, deregulation, DEI, nationalism, etc have been a distraction from this fundamental shift in American society. Always follow the money.
Fortunately, the current administration understands this better any previous one.