billionaires may well recognize that they are the beneficiaries of a rather unfair system, but they may also balk at giving back their gifts, if it means handing them on to a quite inefficient, often opaque, and quite self-interested institution
maybe a solution is to sell government positions for taxes; the wealthy buy seats in government with increased taxes.
on the surface this seem like a terrible idea, but any self-serving decisions while in government would just lead to more taxes, etc.
in any case we should move away from a system where the ultimate bragging right is how much money you accumulate.
for example, i believe the status of rich ancient romans was tied to the public works that they enabled