Actually, the vast majority of Australian athletes who compete in the Olympics are considered amateurs, as opposed to professionals athletes (eg. AFL or NRL footy players) - in that they receive little to no payment for the countless hours of training, equipment costs, coaching and competitions (of which there are comp entry fees, flights/travel, accommodation, food, visas if heading overseas, etc). Most if not all juggle their training/competition schedules with fulltime jobs, family, and other commitments.
I have to say that I'm a bit disappointed in the cynicism expressed in some of the comments above. I'm actually training and aspiring to compete in the 2016 and 2020 Olympics, although I intend to fund my own way there and not expect a handout from the govt or anyone else for that matter. Since the sport that I do isn't a mainstream sport (like most sports in the Olympics), there's virtually no funding for it anyway.
Then there's the question of why I'd spend the next 1570 days (or 2920 days until Aug 2020) trying to go for something that I may not even end up qualifying for. Well...there's a 101 different things I could do with my time and $$ but I guess it came down to choosing a vision/dream that is going to demand everything of me physically, mentally, emotionally, spiritually etc. I could just be like the average Joe and that would be all good and fine - but in the end I really had to ask myself how far above and beyond did I want to go. That's what the Olympics mean to me anyway - even with the politics and pork-barrelling, as an athlete it represents the opportunity to perform at the highest level, and celebrate the journey that it took to get there.