Why are most rich people assholes?

I was about 12 i think. My dad was telling me about his dad and other rich people he knew.

After a while I said something like "sounds like you don't like them much"

to which he said "no, i don't really, most of them are complete assholes"

i thought about that and after I while i asked

"are rich people rich because they are assholes?"

and he said

"no, but they think they are"

pop