The majority of migrants don't permanently move to a new country. And really, does it make sense to categorize people on their unknowable intention? Especially

The majority of migrants don't permanently move to a new country. And really, does it make sense to categorize people on their unknowable intention? Especially since this can clash with legal reality. Undocumented migrants sometimes intend to stay permanently, but as soon as immigration laws are enforced, they will leave. And many foreign workers who intend to return to their home country never do so, rendering the distinction moot.