<<But the issue remains that European ATC is more expensive than American ATC. US ATC can definitely channel more traffic with less cost.>>
Presumably you referring to Air Navigation charges? Light aircraft pay not a single cent for many ATC services over here.
Europe is somewhat different from the USA. We have a dozen countries all crowded together and not a lot of space to play with. The USA has miles of space to play with, which will undoubtedly result in more traffic being moved. Unfortunately, mid-air collison statistics suggest that things are not quite so safe in the USA as they are over here. Surprisingly, perhaps, some US ailine pilots I have met preferred UK ATC to back home, maybe because things are quieter.
Last time I checked, US ATCOs were earning about twice what their their Brit counterparts got. Cost of living over there is dramatically less than over here (in the UK, gasoline is somewhere around $10 a gallon and food and housing is far more expensive).
Next time you want to compare jobs and salaries, try doing so with your heart surgeon......