A wall is a bad idea.
We should implement a plan to bus illegals back home. The need for thousands of buses would create thousands of jobs in the auto industry and related businesses. It would reduce the current oil glut by using huge amounts of petroleum products in countless bus trips, putting tens of thousands of oil workers back to work. It would put the price of oil to record levels thereby stabilizing the world economy. And the world would be saved! /s
I like your idea.
Except why can’t we do both. :D
(I know, I saw your /s)