> A median figure is not skewed by high earners at the top.
That’s exactly my point. For “not skewed by” read “reveal the fact that”. Neither averages nor medians tell you much about the shape of the distribution, but the shape does matter.
Also you’re missing my point about education and health care completely. Yes the OECD accounts for their value overall, but that value is very unevenly distributed in the US. Much more so than in Europe. I also made a point about quality as against just spending.
Second, the OECD adjusts for differences in government transfers like healthcare and education.