For the class today over at UNC, A. Rosenberg and I tried an exercise.
Not really a fair test of Rawls, but just thought we'd see.
We bought lottery tickets, enough for the whole class.
Before we handed them out, one per customer, we told the class they had to decide whether to (a) put all the class winnings into a pot, to be shared, or (b) each winner keeps his/her winnings. Alternative b won, about 2-1, in a class of 30.
Most people got nothing. Three people won a dollar. One young lady won $25. And got to keep it all.
So much for the Difference Principle....