I think they know what is "wrong" in the sense that they ought to be punished for it, and they see themselves not being punished for it (except for "free vacati

I think they know what is "wrong" in the sense that they ought to be punished for it, and they see themselves not being punished for it (except for "free vacations"), hence they see their personal (not incredibly developed) morals above that of the morality enforcement mechanisms society puts on them. They probably override what we see as decency by simple reasonings ("those people have no idea what it's like on the street"), and they're addicts trippin' on that power and moral superiority.