Idiot is the perfect example that one can be evil and stupid, yet still rise to power,

[MoonRiver]

if born into wealth. Scary but true.

[BuffaloJackalope]

1. The Peter Principle

The Peter principle is a concept in management developed by Laurence J. Peter, which observes that people in a hierarchy tend to rise to their "level of incompetence". In other words, an employee is promoted based on their success in previous jobs until they reach a level at which they are no longer competent, as skills in one job do not necessarily translate to another.

https://en.wikipedia.org/wiki/Peter_principle

[MoonRiver]

2. Not really. That applies to people who rise through the normal ranks.

Chump got everything handed to him, and proceeded to squander it all. Then he was handed more. As we say, this is not normal.