The problem is that the walls are in the wrong place!
One set of walls should be between our pocket books and govern-cement.
This would actually make most of the discussion of border walls moot.
But really, this idea that govern-cements have divvied up all the land is where the problem starts.
The governments should only be able to claim only that land which they tend and maintain. Leaving places for those disenfranchised to leave to.
RE: Walls Don't Work: AKA A World Without Walls