I personally think it is 'mostly' post scarcity with little thought for the future. I don't recall if this is because Krakoa can provide for the current amount of mutants, or it is truly unlimited. But I would assume as more mutants appear, Krakoa would need to expand or the Krakoan population must be finite. And even if it does expand, expanding would eventually begin to encroach on other people's land and resources. And you only have so much Earth to expand into before there is just Krakoa and no one else on the planet. So, I think the answer is that resurrection will eventually become a Krakoan overpopulation problem at some point.
Someone else brings up the good point that there are infinite planets to terraform, but that would get into all sorts of galactic conquest and colonization that I’ve personally just never seen the X-Men as part of. And would mutants really want to leave their home planet enmass if there is land to expand (read colonize) into? It brings up all sorts of cool stories and questions to my mind.
Two more questions, however, are:
What does the value of life and a life well lived become if you can always just press the do over button? Quenten is on his 45th life trying to get it right, and who cares how crappy he’s been because he can just resurrect and try again. I really haven’t seen any of the psychological costs of dying and resurrecting or what it means to live/be human. As usual, all Xavier and the mutant leaders seem to care about is how useful the mutants they resurrect might be to their ‘dream’. I think this would've made much better stories than the X-men team throwing themselves at bad guys in frontal assaults and just getting resurrected to do it over and over again.
And the second is what about the human loved ones who will grow old and die beside the mutants? The wifes and parents and children without an x-gene. I see a really poignant Tuck Everlasting story to be told staring the Guthries or some other mixed family.