Until we address the monetary system I don't see how much else matters in restraining the elites. Generational wealth will just move even more so into non-taxable things like art, favors, interlocking directorships, foundations and so forth.
I'd like to see a georgist tax regime[1] and monetary expansion managed via a citizens dividend. But the current monetary system will only be pried from the cold-dead hands of our elites, so I'm not optimistic.