A Squared,
With a lack of data, I don't know how McGee could have dealt with the expat factor any other way. As you've seen, his report is highly data driven.
The regionals here, on the other hand, are having a serious issue with pilot supply.
I say that's an artificial problem created, to an extent, by the recent action of the government. Not sure how that'll be overcome.
Maybe more Aussies ?