A predictable consequence of the move to increase the minimum wage to $15 an hour will be the hastened transition from human to a more robotic work-force. A photo that went viral this week showed a robot "manning" the take-out window at McDonald's. You can expect to see more of this. Employers will, of course, be pilloried by the usual cast of economically-challenged Marxists in the political and chattering classes as heartless, sexist, homophobic racists, etc., who put profits before people. But the non-economically challenged among us realize that the increased use of robots is a completely rational response of...