Guess they also create their own personal electricity, water and sanitation systems.
I found the most loathsome part of AS to be when Rearden's plant is taken over by the workers. They are literally described as a mass of ants munchywunching on a corpse, and burning and destroying everything in sight. It's a scene that wouldn't be out of place in Harold Gray.
Who, while not a Randian, expressed much the same views, one reason LITTLE ORPHAN ANNIE is a vile strip.