In brief, it's the same problem with the world of The Matrix. At the end of the day, that sort of life isn't "real" in some way. The masses are blissfully ignorant and patronized. It would be a robust (possibly unending) discussion to fully explore the philosophical implications, since it's an existential question at the end of the day.

The scene from The Matrix where Cypher enjoys a "steak" with Mr. Smith: http://www.youtube.com/watch?v=Z7BuQFUhsRM