Barring people who are already suicidal, I doubt anyone would want to volunteer. This is a hard problem, well beyond the concerns of political correctness.
However, you bring up some good practical points of the consequences. A person's life ripples out and touches other people around him.
As I said, this is a hard problem, not one solvable simply through a die-off or a cap on reproduction. At the heart of the problem is that each of us are self-centered to the point of ignoring anything beyond ourselves. We're already zombies in a culture of mindless consumerism.
In First World countries, if you take away an individual's "job", "work", and "productivity", then that individual is lost. He does not know why he is here or what his purpose is. All he knows is that he needs to pay his rent and mortgage, watch TV, raise a family, and go shopping. People who do not fit that mold is either outcast or assimilated. Braaaaiinns. A few people might see beyond it thinking, let's do a startup! but end up mindless hitting the refresh button to see new comments on HN.
Heh, zombie apocalypse is already here, and we didn't even see it coming. Though we did make some great TV shows about it.