> I don’t know the way around this, but I do think it’s good that power is not centralized in one governmental structure, even if that structure is Democratic

If your assertion is that nobody should wield nation-scale power, then I agree, and welcome to anarchism!

If your assertion is that billionaires are an effective check on governmental power, I'm... not seeing it. Particularly given how much power billionaires have to influence the government itself.