There is an interesting treatise called "Exit, Voce and Loyalty" by A.Hirschman that talks about the reasons for withdrawal from a relationship, be it employer-employee, or state-citizen interaction. I think Paul's reasons for 'job hopping' fit into the Exit camp, withdrawing due to either inability to change things or unwillingness to confront the system in a free market with plenty of exit options.
highly recommended: http://www.amazon.com/Exit-Voice-Loyalty-Responses-Organizat...