i think it's because a lot of rich people are psychopathic thieving manipulating cunts, probably the broad majority of them above a certain strata
i moved rapidly, briefly, up economic strata a few times and there's a certain point after which it's like "what's the point of this?" and looked around and realised i was surrounded by toxic people
it's not that power corrupts, it's that the corrupt seek power, and wealth is one path to it