Nazi Germany required you to pay next year's taxes in full before they would allow you to emigrate.
Communist countries put up walls and/or shoot anyone attempting to flee. (Which is why we'll get a wall, either we'll build it to keep us safe, or the AOCs of the world will build one to keep us in!)
In the World Marxist Dream, there's no place on earth better to run to escape world misery.
This is how the galaxy will be colonized...