Isn't this a bit like "Students who take too many science classes are likely to be ungodly?" The article starts off from the presumption that greed is bad, and

Isn't this a bit like "Students who take too many science classes are likely to be ungodly?" The article starts off from the presumption that greed is bad, and then whines that people who understand economics better are more greedy. Perhaps it could instead come to the conclusion that people who understand economics are more intimately familiar with the way that best-possible outcomes do tend to arise from everybody acting in their own self interest and thus that "greed" (in at least certain senses) is not a vice at all? Incidentally, as for the Dictator Game, I imagine that you get very different results with economics students and others who are intimiately familiar with the "Dictator Game" and similar psychological experiments than you would with someone who has never heard of this situation before. That might be an interesting experiment.