Money—it boils down to money. It's not an exciting immigration selection category in the first place. You're either related to the parent and grandparent or you're not.
Still, if we were to allow zero income as a threshold, I don't know how many applications we could expect to pour into the system, but we can make the problem go away by giving a credit of $5,000 to each young person in that family by reducing the threshold based on family size. Under those circumstances, I think the regional issue will dissipate.