Internships, Minimum Wage, and Questions For Progressives That They Prefer to Not Answer

Professor Mark Perry has two questions from economist Bryan Caplan that "progressives" hope you never ask:

1. If the minimum wage is a good idea, shouldn't unpaid internships be illegal as well? If not, why not?

2. Name the main arguments in favor of the legality of unpaid internships. Aren't all of them equally good arguments for allowing people to work for wages greater than zero and less than the minimum wage?

We are sure your friendly, local, tenured Marxist sociology professor hopes you don't ask these questions.