uh... probably because no one would want to live on the moon and the cost to get sh!t up there would greatly outweigh the value of having those products.
If it's one thing that my economics class taught me, it was that we're not going to live on the moon.
Besides... how would you go to the movies? How would you go clubbing? All the cool people would stay in LA, NY, FL, Cornelius, etc.