"But just as the human body didn’t evolve to deal well with today’s easy access to abundant fat and sugars, and will crave an extra cheeseburger when it shouldn’t, the human mind, apparently, didn’t evolve to deal with excess money, and will desire more long after wealth has become a burden rather than a comfort."
Power attracts the corrupt, and it does corrupt. This is why handguns are (for a certain type of person, i.e. those who are explosively impulsive) so dangerous. Holding one gives the power of life and death.
Being in power tends to make people arrogant, short-sighted, and less creative than they'd otherwise be. Power relationships are generally negative on both sides, thus worse than zero-sum.