What connection, if any, is there between the amount of money spent on health, and well-being?

What connection, if any, is there between the amount of money spent on health, and well-being?
The topic for the forum is:

Developed countries spend between 8 and 17% of their Gross National Product on healthcare. This is a large proportion of our income, and there is a strong tendency for this percentage to increase over time.
What connection, if any, is there between the amount of money spent on health, and well-being?
• Can we afford to spend so much?
• Is this large amount of money well spent?
• Is there a relationship between the proportion spent and the quality of
healthcare provided?
• Is there a relationship between the proportion of GDP spent on health
and the health of a nation?