Farah wwas right, Gallen was right. Most fans knew Queensland would get the refs to piggyback them to a win just like NSW got in game 2 last year.
Since the game is decided by ruck speed and freedom it is easy for a ref to set the 'difficulty' for each team. One has a 12m offside line and the other only a 7-8m one, one allows markers to stand shoulder to shoulder for one team but single file for another. On top of that are the grey areas of strips, knockons, forward passes.
All this has come in stride with a bias for bigger players and an emphasis of playing the match on the ground rather that on their feet (i.e standing/running) which is what leads to the various boring wrestlemania games with 10 second play the balls, or worse 10 second for one team and 4 seconds for another.
It affects every team at every professional, semipro and high standard lower grade competition. At NRL and Origin level it can be used for 'control match fixing', borrowing the control adjective from control fraud theoy, this is something where the organisation itself (i.e NRL/ARLC) deliberately fixes or attempts to fix match results so that they maximise their business interests, an origin square up at game 2 is an example.
Another example is not quite as deterministic but still interference is the well known sympathy refereeing and penalty count square ups that some losing teams see in later stages of a match, ideally to keep viewer attention and to prevent them from switching off by making the game closer than it should be under neutral refing.
On top of that we have the human elements and human error that will also affect refereeing, this includes subconscious priming of a ref by crowds, media, other refs, as well as personal bias.
One solution is to make the ruck/tackle a bit more black and white, by calling the tackle when a player has been held without free progression forward for the desire amount of seconds. Rather than allow them to struggle on and attempt an offload 5 or 10 seconds after their forward progression has reached a snails pace.
It is amazing while the ARLC has done a shoulder charge inquiry they have neglected to do one on refereeing, not a pissweak change of staff but a full blown statistical analysis of the effects of subjective refereeing on every facet of the game and the frequency of such. It is perhaps the most important thing to maintain the integrity of the game and it is obvious that the vast majority of league fans have at least some thoughts on the state of refing.