The real question to ask CASA is: What contraventions of the aviation law by Qantas or its personnel have you ever found?
Most likely in the long run we will possibly see the same relationship Boeing had with the FAA has been happening with CASA and QF. That is the governing body passed so much on in self regulation that they really have no idea what happens within the company and any regulation is based on receiving the right reports from said company and waiting for something to happen. I've worked in a few GA companies where CASA turned up and have very little idea what we did, look at some systems and procedures, make sure logbooks and duty times are consistent and moved on without a lot of comment if you just shoved a lot of paperwork at them. Only thing they could pick on were aircraft placards, maintenance releases and some logbooks needing work, the actual operational side was almost ignored.