The thing that always bothered me about these arguments is that they always seem to assume that a life (indeed even a life lifted out of poverty) is a net loss for everyone. It is possible for a life to produce far more for others than it consumes. The entire western outlook seems based on this idea.

I would think that a life lifted from poverty, even temporarily through aid, has a much better chance of being one of these human++'s. Without quantifying (and denying) this possibility, calculating the value of aid seems impossible.