It depends. It differs between countries. I have heard in Eastern Europe doctors buying their diplomas just as public prosecutors, judges, and so on.
Another example: someone I went to school with has bought himself a "public prosecutor" title. He doesn't work as one, but it gives him a higher rank than any of the traffic cops he encounters daily. So he basically speeds and drives recklessly around the city like an idiot. When a cop stops him, he pulls rank tells him to fuck off, and they all do. He out-corrupted the corrupt cops. If it wasn't tragic, it would be funny.
That is just an example of an end-game for when cheating and corruption spreads completely throughout the society. And it always, in a person's life starts with education. That is where they learn and internalize how to cheat and how to game the system using it.