Earlier quoted context omitted.
I think you’re putting the cart before the horse. Why is there a shortage of low skilled workers in a country of 400m? Because you have illegal workers who’ve driven the price of that work below what the market legally supports. If the law was effectively enforced those low skilled jobs would pay enough for Americans
Vegetable and dairy farmers would go out of business, if prices can't be raised due to competition from imports. You'd need tariffs as well, and people would need to put up with significant price increases at the grocery store. There are not many Americans who want their kids to grow up to be farmhands or migrant workers. If you can speak English, you're better off in retail. For immigrants, there is a valuable benef…
I personally lack a romantic attachment to these industries, but in general people seem fairly happy to support something like the dairy industry.