A good, first approach is to structure incentives to encourage people to move from irrelevant communities. Such as not punishing manufacturing for moving overseas, ending non-strategic subsidies, and similar as the stick, and funding non-profits dedicated to helping people relocate to areas with brighter opportunities.

We will have to do these things due to climate change anyway (create policies to handle migration) if the Agricultural Revolution is to ultimately win over Nomadism, we may as well figure out things that work here and now.