Poor people move for Medicaid or housing. If you have a chronic condition in a state that doesn’t offer optional services, it may make sense to move to a state like NY that offers them. At one time, the county social services folks would offer you a bus ticket to help you on your way.

Housing is a similar issue, if circumstances call for subsidized housing, it’s often easier to move to a big city like NYC.

Schools are another big reason. If you have kids and live in place with poor governance like Kansas, you’ll likely benefit from moving.

There are also snowbirds who return to northern states for medical reasons, usually due to different policies.