While I wholeheartedly agree, we need to “solve the concentration of power in the hands of the few problem”. Even if you simply said all the stocks and shares of current billionaires can’t have money lent against them (or however you want to address this without taking half the economy with it), there will just be a new class of psychopathic narcissists to take the place of the current ones. I feel without some kind of set of laws which enforces continuous dilution of power by somehow spreading it across more people and randomising who is allowed to influence what (which can only really be done with computers or AI) these cycles will repeat themselves ad infinitum.