[downut]

They move to where the jobs are. And the small town where they got their schooling hollows out.

[rangestransform]

They move to where the jobs are but the ones left behind without a big-city job have disproportionately large political power and disproportionately little education. Letting land vote was a generationally catastrophic mistake, the US has a political system suited for an agrarian/early-industrial/frontier society rather than an urban industrialized society that also happens to be hegemon of the world.

[s1artibartfast]

or they dont move, get angry and resentful, and want to upset the economics system.