Off topic but important to know.
I will be honest and often I help people circumvent certain parts of the visa system often. Our group being about 850,000 people far more than 4,000 pilot members and trust me that is not enough votes for your MP or Senator to care. 850K across Australia is not enough.
I did indeed see comments on SA fraternity, about the same as any other group operates. I would expect that new Qantas recruits would have similar education, training, back ground and experience to the ones employing them it is human nature to pick what you know.
Often people don't get a job because they think "I deserve it".
I help people circumvent certain parts of the visa system because - two Senators offices told me "we need to leave a kid behind" as security deposit for reason to return for my fiancé and kids to visit Australia (we had 2 previous refused)to meet my kids and Australia.
So I know there are problems with the system, but the 457 area is not the main problem being told to leave a kid behind is worse IMO.