Imprisoning known and apprehended lawbreakers for the crime of illegally entering this country (in addition to whatever other punishment they receive for other laws that they have broken) and then sending them back where they came from after their sentences have been served would be something that would not be lost on others who are here illegally or who are thinking of coming here illegally.
Just as people can do many things better for themselves than the government can do those things for them, illegal aliens could begin deporting themselves if they found that their crime of coming here illegally was being punished as a serious crime, and that they themselves were no longer being treated as guests of the taxpayers when it comes to their medical care, the education of their children, and other welfare-state benefits.
Here’s a thought – Has Sowell ever gotten something wrong? I assume me must have, but I’ve missed it.