Whu?
If it's only amatter of doing the paper work for CASA, and still paying squillions in fuel surcharges etc, then why would anyone bother? They can get a business administration firm to do that.
It will only apply to private flying anyway, and probably only small aeroplanes.
If it is completely redone so it's like SAAA, with their own very simple rules etc. then there is merit in the sugestion, as long as CASA come up with lots of money to pay for the work.
The real purpose of CASA is to protect the Govt from legal liability in aviation matters.