Sure, it is just not as one dimensional as this cherry picked graphic implies. Education is also a likely contributor.

The optimization would be : cost low, life expectancy at max… however… it is not that easy… ‚Let’s Just copy the system of Japan‘ just would not work… or maybe it would!

However, best healthcare will not help you if have a unhealthy lifestyle which is known to be a common issue in the US especially. Not sure how it is about Australia though!