At the end of the day Airlines are always going to be able to open the floodgates to the world to come and work here with zero resistance from the government.
Can I respectfully suggest that there is no massive pool of pilots overseas who are being held back by these floodgates. The global nature of aviation has seen to that. Chinese carriers, ever the pragmatists, are simply throwing money at the problem. The ME3 have no idea what to do so are looking at a merger. There may well be a few South Africans and South Americans who would like to move to Australia to work but certainly not huge numbers. I know this talking to managers and recruitment companies who have gone looking and found the well to be dry.