And it's nevertheless the best argument we have. You see, capitalism would suggest the price of any product goes down to the marginal cost. That means the price

And it's nevertheless the best argument we have. You see, capitalism would suggest the price of any product goes down to the marginal cost. That means the price paid for labour should be just barely above subsistence. Do you want to live like that ? If the answer is no, you must find a way to avoid it, and not being an "open borders weirdo" is one of the more common suggestions.