[rchaud]

Because the sample size for "mega-rich" selects for more psychopaths per thousand people than the sample of people who are "just rich".

You can get "just rich" by being a doctor, or a partner at an IT consulting firm, without screwing people over.

But to be "mega-rich", you have to be OK with screwing people over any chance you get. Over time, that behavioural trait has a compounding effect where you don't see things as "right" and "wrong" anymore. That perspective is accelerated further as their money and power insulate them from consequences due to the political and legal latitude it can buy.

Bill Gates plotted to dilute Paul Allen's Microsoft shares because "he wasn't pulling his weight" when he was undergoing cancer treatment. Goldman Sachs' top legal counsel Kathryn Ruemmler accepted expensive handbags from Epstein and called him "uncle" in communications after he was re-arrested on trafficking charges. Bezos, Musk, Zuck, Ellison...need I say more?