Earlier quoted context omitted.
Nothing compels them. It is who they are. And they are not alone in being like this. The better question is, why are so many people in positions of authority like this?
I believe the positions naturally draws people who are bullies. Not that all of them are, but the power over, and respect from the general population is probably very attractive to people who get a kick out of being asshole. Also, while I can't confirm the prevalence, there's a ton of anecdotes you here about shady hiring practices. There's the now popular story about a department refusing to hire people who had too…
this is not just anecdotal, and has even been tested in court[0].
0. https://abcnews.go.com/US/court-oks-barring-high-iqs-cops/st...