The only reason there is a (possible) shortage here is because the pay is so much lower, and not looking at going up anytime soon, so guys are finding better paid, easier work outside of aviation. Certainly don't see that many decent jobs advertised. When I came here my pay dropped about GBP5K, and belive me Sydney is not a cheap place to live. Probably getting on a par with London when you look at actual living costs, ie housing, food etc. On the plus side eating out and petrol are cheaper.
Also bear in mind that industrial relations are, eeerrrrrr, combative at best. Employers running conditions down and unions arguing the toss on trivia, both sides are to blame IMO. Contracting is virtually unheard of as well so the job market is quite restrictive. Look very seriously before you leap.