Nope, even adjusting for health care costs the average American is still roughly 20-40% richer than the average European. This may come as a shock to you, but roughly 20% of Americans are on Medicaid, our state-sponsored healthcare insurance. America does actually provide healthcare for its poorest citizens.
When I run the calculations and take vacation, health, education for the median person they are close to similar.
But these calculations does not take into consideration: less noisy cities, walkable neighborhoods, longer life expectancy, higher quality food, better workers protections, education, etc.
An honest study would need to include the value of the commons.
> roughly 20-40% richer
This is likely wrong. Americans have better purchasing power, but are not necessarily richer.