[TomMasz]

Something definitely happens to people when they become extremely rich. No one will say "no" to them for fear of reprisal. Most of us encounter limits on what we can do, not enough time/money/political power/etc., and it really seems like those limits keep us sane. Once we lose those limits, or believe we've lost them, bad things can happen.

[macNchz]

I think–the way societies often have social norms around potentially harmful things–this reality is a significant driver of social norms among "old money" families with generational wealth. In those circles there is social pressure to not to talk about money, to not spend ostentatiously, and to socialize your children together at specific boarding schools and universities where they will be among others who share these values.