One estimate suggests that one out of every 10 employees on Wall Street is a psychopath. https://www.theatlantic.com/health/archive/2012/03/is-wall-street-full-of-psychopaths/254944/
It's said that “power corrupts,” but actually it's more true that power attracts the corruptible. The sane are usually attracted by other things than power. When they do act, they think of it as service, which has limits. The tyrant, though, seeks mastery, for which he is insatiable, implacable. - David Brin