I think you've mistaken two desireable dimensions as a choice. A country like Norway beats the U.S. in both GDP per capita (PPP and nominal) and in all measures of inequality.
I was making a different point: that measures of equality are not equivalent to measures of 'goodness' or proportionality. The statistics you are using are biased against the USA because of the high rate of immigration to the USA; if you control for this, the non-immigrant US citizen PPP and per capita GDP are much closer to Norway's (though I'm not sure whether the US is higher or lower than Norway). I have lost the source for this, but can provide you with this citation that shows what a difference there is between the largely unskilled first generation immigrants (that make up a large portion of the US population), and later generations.[1]
disclosure: I am neither American or Norwegian by country of birth or residence
There's an implied choice just by bringing up the subject of proportionality.
As for stats we can attack a legion of asterisks to them but that misses the point: there are rich countries that are not unequal. Proportionality is not relevant to the discussion about what the US should do to restore truer meritocracy.
