I don't generally make much distinction between goods being necessary or not, as I'm not personally the arbiter of that. I do tend to think we're post-scarcity on more than we might sometimes think. I also don't favour policing hours of work (I too dislike labour notes).
I generally see some sort of community assembly (and associated sub-group, etc) as the vehicle for making those broad decisions on production. If a good is scarce, there are decisions made on (1/?)