There's a long queue of pilots waiting to fly tugs at most UK gliding clubs, because the flying is fun (so the tuggies tell me) and the club pays the costs. Normally, experience as a glider pilot is demanded. I'd guess this is true in Australia as well.
Checking out the local gliding club would be worth while, as Australia has some amazing flying conditions. A 500km flight is routine - only 750k and upwards is much to celebrate!