Do you really need an explanation or were you hoping for a list of specific candidates ? You get neither.
If Rugby League aspires to be a World Game then it needs start behaving like one and use Neutral Referees the same as Soccer, Union, Cricket etc. instead of letting Australia call all the shots.
And anyone who thinks Aussie refs are the best might like to explain why they need 2 on the field and why they make so many bad calls, every week and in nearly every game and even when the calls are dissected for 10 minutes by a video ref, still get it wrong. I watched this years Club Challenge games in the UK, lovely to watch, one ref, mostly free flowing, minimum errors, minimum controversy.
Any Tongans in tonight ?