Why are cops called pigs?

The term "PIG" as it referes to police officers or law enforcement in general comes from the book Animal Farm by George Orwell. In that novel the pigs were the ones on the farm that maintained order among the other animals.

P = Police

I = In

G = General

-Edited by Ronto
Because they think it makes them sound cool. All it really does is show their lack of respect.