Hell the whole reason why democracy is thing is because monarchies of yesteryear have proven quite decisively that the ability to raise capital and spend well for society are not even remotely linked.
We need to consider very carefully as a society what the impact of the billionaire class has on how our society develops, and the outsized impacts they can have on democratic processes.
Personally I don’t think having such wealthy individuals is a good idea. Their wealth is so great it’s pretty much impossible for them not to get wealthier, and do it at a rate greater than than the vast majority of people. And their ability to deploy that capital to influence society is scary, effectively taking the role of government to provide social services, and placing it in the hands of a wealth few.
We’ve already seen what more extreme individuals are prepared to do with that power, just a Hobbylobby and David Green’s continued vendetta against abortions and safe contraceptives.