We still have violent criminals in UK, Australia and probably Belgium too. So I have no idea what on earth you are basing your opinion on. Australia's size and central emptiness is incomprehensible to most foreigners. The middle two thirds of Australia is a big huge desert. If you drive from east to west, you will routinely drive 200-300km (~300 miles) between petrol stations, with nothing but the road and some shrubs in between. We have large amount of NOTHING in this country, and you can drive for hours and hours and not pass another human being. Heck I could drive from my house straight north for about 14 hours and not be at the northern tip of my own state.