australia is fat for exactly the same reason as the states, sorry if i was sounding arrogant. aussies are getting fatter and fatter, i think we are almost the same per capita as the US, I have spent a bunch of time in the states, one thing I noticed that there were noticeably more morbidly obese people, people you cant help but stare at they are that big, there seems to be no middle ground there, people are wither fit or they are fat.
Australia have a obsession with quantity also, big steaks, big meals, fast food is taking over, its cheaper and easier to go get burgers for dinner then cook something healthy.
As for me just to get some perspective, I have worked in hotels as a pastry chef for a few years, before that I was a chef de partie at a steak house. right now I got into crossfit about a year ago and has just started a Paleo Diet, going ok so far.