Correlation does not imply causation, but that doesn't mean that correlation cannot be by causation. It sounds likely that these negative features arise from ha

Correlation does not imply causation, but that doesn't mean that correlation cannot be by causation. It sounds likely that these negative features arise from having received power. It's like Abraham Lincoln said, "Nearly all men can stand adversity, but if you want to test a man's character, give him power." Also, I'm sure that to get to such positions, these people were thoroughly reviewed by others in all their aspects before being given such positions, so what you suggest is already done to an extent. It may be however that those people doing the reviewing may find these features desirable, or at least not bad enough to outweigh the features they found that are desirable.