Frogman we have 2 cops in the family, neither of them are paid by the ticket. Never heard of such a thing.
The problem is that the government as a whole (including police) benefits from ticket revenues, and governments tend to evolve to milk revenue sources as much as they can. Unless you completely decouple the organization funding the police from the organization recieving the ticket revenues, you will see this effect.
What's the most effective department on any college campus? The parking nazis.
If the school owes you money you are entitled to, good luck getting it, a huge pain in the ass. But if you owe them money, they will damn sure track you down and extract it from you. Amazing that U of Illinois could never get any correspondence to my correct address, but when I had unpaid parking tickets, they managed to track me down even though I hadn't notified them of an address change.