I think cops are a dichotomy, in one sense they do a dangerous job with little appreciation or compensation for the comparative risk. But the very reason I believe a majority become police are for the power and ego trip that it gives them. Especially the younger ones, who haven't learned that being over zealous isn't going to change the world as much as wear them out. I've known for quite awhile that being polite and stroking their ego goes a long way in avoiding judgment calls. The reasons for many professionals doing what they do are similar with EMT's, firemen, leadership positions etc, it's a merit badge to wear.