https://en.wikipedia.org/wiki/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 "a level of respective incompetence": employees are 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.[1]
The concept was explained in the 1969 book The Peter Principle (William Morrow and Company) by Laurence Peter and Raymond Hull.[2] (Hull wrote the text, based on Peter's research.) Peter and Hull intended the book to be satire,[3] but it became popular as it was seen to make a serious point about the shortcomings of how people are promoted within hierarchical organizations. The Peter Principle has since been the subject of much commentary and research. Co