That's an interesting paradox to think about. Make it legal and it's no good. Why? Because as long as it's illegal the people who come in do not qualify for welfare, they don't qualify for social security, they don't qualify for the other myriad of benefits that we pour out from our left pocket to our right pocket. So long as they don't qualify they migrate to jobs. They take jobs that most residents of this country are unwilling to take. They provide employers with the kind of workers that they cannot get. They're hard workers, they're good workers, and they are clearly better off.
Milton FriedmanThanks to economists, all of us, from the days of Adam Smith and before right down to the present, tariffs are perhaps one tenth of one percent lower than they otherwise would have been. And because of our efforts, we have earned our salaries ten-thousand fold.
Milton Friedman