Shadow,
the whole CAsA "Iron Ring" philosophy was that no aviation accept the RAAF and airlines would occur.
CAsA was first stacked with ex RAAF failures, they then over time manipulated things until CAsA became unaccountable.
Now they are regulating GA out of existence. The theory is, if you want to be a pilot join the RAAF, serve your commission, then move on to an airline,in other words a closed RAAF shop.