The future of humanitarianism?

I do not know how the UN is doing it: raising funds and staying on track to meet the MDGs considering the economic collapse in Greece, the threat of the same in Ireland, and well...the whole global economic crisis.  The UN does manage its own budget, per se, but is entirely dependent on its member nations opting in.  By extension, the humanitarian efforts spearheaded by the UN are entirely dependent on those same members.  I can't speak about other countries (I can only make an inductive leap regarding the same unemployment troubles in Spain) but want to ask the question about whether or not the current economic environment will have a lasting effect on humanitarianism?  I ask because: do depression era generations donate?  I don't know.  Any want to share some ideas?