The types compass flew were hardly compatible with the heavy maintenance facilities and authorisation holders abilities so that's a bad example.
However, Qantas management have gone into bunker mode in the last decade, they are not interested in being entrepreneurs of the aviation world. They handed back all of their line maintenance customer contracts nation wide to try and strongarm their workforce into submission. Of course they now realise it was a mistake because the perpetrators of that crime all got sacked shortly after. I digress, Qantas could've and did have the facilities and manpower available to do all the work available in Australia with a world comparable scale.
It's not a hard stretch of the imagination to see that if Qantas, Jetstar and Virgin put their comparable aircraft types, the 738's, A320's and the a330's into the same facility the scale would be there - it would be a cost saving all round. The whole wages argument is moot, heavy maintenance exists in high cost European countries. While I don't disagree that Qantas's 3 previous heavy maintenance bases wasn't ideal for a cost structure, having duplication all the various non productive staff, managers, planners, HR, admin etc there is no reason why if the 3 airlines flying in this country got their act together they couldn't put together a world leading MRO.
But once again, that would take foresight.