Maybe the people who get this rich due so at the cost of their mental health.

It is not that power corrupts, but that it is magnetic to the corruptible. Even the extremely rich tend to not wield power with such a kind of wild abandon as elon, they tend to offset as much responsibility as possible and ride the wave, because the level of delusional self-importance you need in order to believe yourself smarter than literally everyone under you is even too astounding to the leeches of society.