The opposite would happen. Labor would be right size and wages would truly go up and pull many off the welfare and public assistance. It would be so wonderful, roads, schools hospitals would be accessible again and not overrun. YOU HAVE IT BASS - AKWORDS YOU FOOLISH VIRTUE SIGNALLER.
You are simply wrong in your analysis.
Getting rid of 12 million criminals and deadwood along with cutting off welfare for those left ( many would self deport) would be a net positive that our economy could equilibrate to with maybe even a significant net positive.
30 million?
No way.
Drain 30 million people out of the country in 2-3 years?
Our system would shut down and President Trumps MAGA agenda would die on the vine