Disney is notorious for paying below-market rates. There's a massive supply of naive vict--err, candidates-- sufficiently enamored with the idea of working at a well-loved cultural touchstone that they'll jump at the opportunity for almost any salary.
It usually doesn't take too long for employees to be disabused of their childhood hopes and dreams, but it's often a very painful process, and there are always some diehards who never seem to be able to let go. I lived less than a mile from the Magic Kingdom for about four years and saw this process play out many times.
Most people burn out and learn that maybe working on a boring business backend isn't that bad after all, but there's always a huge line of wide-eyed candidates eager to backfill. Companies that fit this profile never learn to treat employees well because, frankly, they don't have to. The same thing happens in games.