Brad DeLong cites Daniel Davies, and gives the Cliff Notes version of Being a Left-winger for Dummies (DeLong calls it "Powerpoint format", which I have to admit is more clever). It is far too long. The whole bit can be summed up as "right wingers are selfish". DeLong pays noticably more in taxes than I earn (gross), making him a rich man. I assume that in the interests of equality and all that stuff that he never deducted mortgage interest, that subsidy for the well off.

I posted a fairly long reply at the BrothersJudd, http://brothersjudd.blogspot.com/. It's titled "Who's Selfish?" (Unfortunately, blogger links are broken, so you have to scroll down.)