In alot of places, police tend to take care of friends and referred people first. The top down control involved in that discourages the rank and file from doing more than required.
When I owned a liquor store many moons ago, the police in that city basically would only respond, at least in any reasonable time frame, to businesses who made regular donations to the "Policeman's Benevolent Society". They didn't even pretend to hide their racketeering; it was openly understood you paid up or you got ignored.
I paid them $100/month, and as there was plenty of crime around, most of the other retail businesses no doubt paid up as well. I'm sure they made good money. I eventually had enough of not seeing much difference between the police and the gangs in town and sold the place.
