From what I've heard the reason for the hatians flooding springfield is some factory wanting them for cheap labor, if we knew who the factory was maybe an email campaign or boycott could be useful.
Maybe a don't work with scummy factory campaign as opposed to a don't work with scummy magazines campaign
They work just fine in a closed system. What you're seeing is equivalent to pumping heat into a system and then going, "and this is why the laws of thermodynamics don't work."
Importing invaders from outside the market is obviously going to destabilize any market. That's one of thousand reasons why they need to go back.