The good cops, such as they are, get run out if they try to challenge the institutional problems in police forces. This radically restricts how good a cop can be while still being a cop.

Can good cops speak up about bad cops and keep their job, or do they have to remain silent? How many bad things can you see in your workplace without quitting or whistleblowing while still being a decent person? Can they opt out of illegal but defacto ticket quotas and still have a career? Does writing a few extra tickets so you can stay in the force long enough to maybe change it make you part of the problem?

Many people look at the problems in policing and say that anyone working inside that system simply must have compromised themselves to stay in.