Also: From MSNBC 29 July 2009:   "NYT:   Cops 'don't get paid to be abused'."

That may be the crux of it.

And in fact that's wrong:   cops do get paid to take abuse.

As a Los Angeles officer, with the force 25 years, is quoted:   "....if you don't have a tough skin, you shouldn't be a cop".