The referees do have a tough job, they get abused by fans, discredited by the media, and their own organisation (or organisation over-arching above them) pressures them to do their job in particular ways subject to the political in-house opinion of the powerbrokers of the day.
The refs are not personally corrupt, but I don't believe they are fair or impartial either. They do what they have been told, and that can change from week to week. The whole NRL is swelling with political pressures and it absolutely stinks.
On an aside, as the referees I feel are stuck in the same mess as us fans and they are not really responsible for the mess themselves, I think the NRL needs to implement a new rule with refs - No player can argue with the ref, at all. No exceptions. No arguing, no questioning, nothing. A captain can ask a polite question, but if it isn't polite enough, instant sin bin for the captain. Instant sin bin for anyone else for talking to the ref also. They need to instil a ref's decision is final, accept it, if they're wrong too bad.
**The refs are being politically pressured to do certain things and they aren't even backed by those pressuring them. That's the problem.**