Organizations don't even have to be large for this to happen. If you're ambitious there's no place for you to move up finding a new job isn't the only option.

Organizations don't even have to be large for this to happen. If you're ambitious there's no place for you to move up finding a new job isn't the only option. People often try to redefine or expand their current job. When it gets out of control it's a sure sign of a management problem.