What else is white supremacism if not the ideology and practices of a class system?
What else was US white supremacism founded on if not the desire to gain wealth by enslaving Africans? Because people didn’t just say, “Oh, yes, let’s go capture some slaves.” Oh, hell, no. They made money at it. Nor did this end with the formal abolition of slavery.
Social insurance undermines class systems. Social insurance programs are so effective that they have to be dismantled, and huge efforts have been made to persuade the public that they would gain from shutting such systems down. (“Put on those chains. You will be much safer wearing them.”)
Do I believe that an end to poverty would be an end to supremacism? I doubt it. The impulse to supremacism seems to be pre-human, and perhaps will turn out to be post-human. But we do not need to governed by it, and it is certain that impoverishing is one of the great strategies and tactics of supremacism.