From an economic perspective, open borders are highly desirable. But you're right that they're not really compatible with welfare programs. I don't know if it's

From an economic perspective, open borders are highly desirable. But you're right that they're not really compatible with welfare programs. I don't know if it's ever been tried, but one solution would be an "open borders, but non-citizens aren't eligible for welfare until they've been here for, asy, 10 years" policy.