I'm an aussie, and i know we cop some heat for always saying things are better at home. But the fact is most people who have come from a civilised country, will probably want to go back. Probably sooner rather than later. If you already have a job that pays OK, has a union and a good pension plan, then don't throw it away becuse you wont be able to get it back in 10 years time when you are sick of the sandpit.
Stick with BA