This may not be the best place to ask, but I'm wondering why "the criteria for earning-to-give" includes ">=$60K annual income"? To me, that seems to be a high minimum that would exclude many who are (at least in their own minds) E2G.

FYI The link to Peter Hurford's article is broke. Here it is on his blog: http://lesswrong.com/lw/hr3/giving_now_currently_seems_to_beat_giving_later/