[CamperBob2]

Yeah, that's not how it works, at least in the US. You're 180 degrees out of phase with the intent of federalism.

There are other countries that work the way you suggest, but people prefer to migrate out of them rather than into them.

[crazygringo]

What are you talking about? Sure you can focus on the state level if you want instead of country-level, but there's still plenty of room for federal policy that supersedes state/local policy.

So it very much is how it works, but there are technical questions about how much and in which areas.

As for migration, I don't have the slightest idea what you're talking about. Most countries don't have a federal structure to begin with, including most democracies.