NPR has a short article up about international health spending per capita, and its relationship to good health outcomes.
In the chart at the link, you can hover over each dot to see the spending in each country. Australia is in the grouping just to the right of Japan and the UK. (I see that Singapore is in the same grouping, too, right beside Australia actually.)
Once again, it seems abundantly clear that the US system is a ridiculous outlier which wastes money for no great results to show for it.