Remember that from the countrywide economic perspective, most of the cost of healthcare stays within the country, so the cost of healthcare really is just a wealth redistribution effort. Free healthcare means 'redistribute very little wealth from the sick to the healthy' while expensive healthcare means 'redistribute lots of wealth from the sick to the healthy'. Social support schemes like sick pay or disability allowance are doing the reverse.

Countries already have millions of ways of moving wealth from or to people - and schemes like income tax or sales tax tend to be an even bigger dollar amount of wealth redistributed than healthcare costs.

It isn't obvious that there is an 'ideal' number, and comparing some metric like "years of life per dollar spent on healthcare" might therefore be meaningless.