This is an amount that would be a meaningful change to most US states' gross annual economic output that we're talking about, and a few people control it. Sounds pretty centralized to me.

The fact that a handful of individuals have half a trillion dollars to throw at something that may or may not work while working people can pay the price of a decent used car each year, every year to their health insurance company only to have claims denied is insane.

Is this word being used correctly?

au·tar·ky /ˈôˌtärkē/ noun economic independence or self-sufficiency. "rural community autarchy is a Utopian dream" a country, state, or society which is economically independent. plural noun: autarkies; plural noun: autarchies

What does it have to do with Trump then? Why was he involved?

And where do you think the socialists of the 60s got hard currency to import machinery from? Borrowing from non-state lenders.