The figures are OECD figures, which are adjusted for cost of living. Stuff like healthcare and public services are a difference, but at the median, Americans have employer-paid healthcare (which covers 80% of premiums on average). And if you’re in an ACA state, your premiums are capped at 10% of your income.

You may be interested in Jones and Klenow (AER 2016) http://klenow.com/Jones_Klenow.pdf, which incorporate consumption, inequality, leisure, and life expectancy to correct for these factors.