Guys gimme a break.
HSC education is the basic standard. If you want to do alot of things these days you will need to at least of completed year 12. Trade apprenticeships these days often prefer year 12.
QF want people who have a certain level of academic achievement. You can do the bridging courses if required. It is not unreasonable for a major international airline to have such requirements. If you look at the USA you won't be a airline pilot over there unless to have University education as a minimum. You would also need that to fly freight over there too!
The best job you'll get in the USA with a year 12 diploma is probably a job a the local supermarket or at McDonalds!!
Year 12 is a minimum education standard and really a basic one at that. You won't find many other jobs based in a capital city that pays QF money where all you need is a HSC. Most jobs for that sort of money you will need many years of experience plus multiple degrees and post graduate qualifications. Every doctor and lawyer in Australia would have university level education yet not many of those would be seeing pay figures in the mid $100 000+
Either go and do a bridging course or shut up! Year 12 is not a unreasonable requirement.