Regarding Australia vs America, if you correlate health care expenditure with life expectancy you get an increasingly negative number with America and an increasingly positive number with Australia.
@bmf666 wants to make the highest possible value in society self-motivated hard work. I don't disagree that's an important value but I doubt it's more important than logic and reason and anyone with a modicum of economic understanding appreciates the principle of sunk costs and the foolishness of throwing good money after bad.
America is spending ever more dollars to reduce the life expectancy of Americans. It's a negative return investment. They're the one's that bankrupt you if you hold onto them.
Apart from 'principles' and political will I can't see any practical reason why the US could not use its health care expenditure dollars to increase the life expectancy of Americans in a manner similar to Australia. In all likelihood it could achieve increased life expectancy at a significantly cheaper per capita cost just with a single payer insurance system for starters. And that's before we even talk about increased quality of life changes might bring.
As thing stand, if we wait long enough this conversation may be a moot point because there might not be any Americans left to pursue it based on current demographic trends,