Yes, I know that the original idea was that a "peace officer" had no authority that wasn't held by any individual in the general population, but was supposed to be someone paid in order to free his time to devote to "keeping the peace". How has that worked out?
Even the notion of "policing" is a bad thing. It's my job to "police" my own sphere. No one can do that for me better than I can- all anyone else could do is interfere. There is no need for a "special" class to do it, and when established that "special class" will inevitably evolve into the abomination we suffer under now.
Because, if I am "policing" my own life, and I go beyond the limits of protecting myself and my property (or the self and property of someone else), I am responsible for my actions and will be held accountable. Reavers are almost invariably found (by their own gang) to be acting "within department guidelines"- even when guilty of the most obvious acts of evil.