Luxembourg, Norway and Switzerland have substantially higher GDP/capita than the US. As for median income, I think you're looking at income net of taxes, becau

Luxembourg, Norway and Switzerland have substantially higher GDP/capita than the US. As for median income, I think you're looking at income net of taxes, because I'm fairly certain that median gross income is higher in Luxembourg and Norway (and in Switzerland) than in the US. If you're looking at net income, you also have to factor in what those taxes do to improve quality of life (a huge amount, if we're talking about the three countries I mention above).