Minima, you may want to check with the rec. office re Thrust's post.
It is illegal to employ anyone in HK without a valid work visa, thus when you first arrive, you get an "allowance", which I remember as being quite generous, until your visa is done. Then you go on the payroll.
As for getting PAID while in Adelaide, hmmm, maybe things have changed in the last few years (though I doubt for the better), but when I did it (6 years ago) you just got some AUD. $50 week I think it was. CX has no reason to pay you as all accomodation and food is supplied. However, I am happy to be proven wrong if recent experience shows otherwise!!