There are though plenty of other countries that offer what you describe above and don't have property prices near Oz prices. Pretty much anywhere in Europe, outside the major capitals. And of course the US does too, albeit with much more restricted free health care.
I've lived in a few places around the world, Sydney is extremely expensive, not just for property but for everything. Based on my own anecdotal evidence, I'd say that rents in New York would be slighty ahead of Sydney but NY is ridicuously cheap for everything else compared to Sydney (I'm talking 30-40% cheaper). Wages are roughly the same. Take housing in that context, afterall you still need to buy food, pay utilities, get to and from work, and Australia (or at least Sydney) looks very expensive.
Agreed, Sydney is expensive for everything. Then of course you get retailers complaining about loss of trade to the internet and so on. People cannot afford to be paying double for the same product locally as you can get it online for much cheaper. The only thing keeping property stable at the moment is low interest rates and high employment. Take one of them away and you get falling house prices. I dont think the most ardinant property bull can argue that property is going to double in value again like it has in the past within the next 8 years or so. Best they can hope for it 3-4% increase year on year and again that is with low unemployment and record low interest rates......
Something will give at some stage and property at the moment is over valued. Maybe we are in for a long period of price adjustments like Japan and Finland rather than a short sharp crash like Ireland