I get your point, but it's hard to shake the feeling that "deferred altruism" is just an "excuse" to keep everything to our self. Also, I strongly believe it's hard to turn generous after being very selfish for a long time. Guess that's what andrewflnr said..
Yep, I get your point too. But I feel that we can't pressure people into altruism so if they aren't going to give anyway, then it doesn't matter whether they fail to do so in one lump sum or fail to do so continuously.
