It's a tough problem because when you go to profit units, you increase the risk in those individual units. Over time, the unit takes more risks because it increases return (that is their driver now). Eventually the people in the unit (or management) become uncomfortable with the risk and want to go back to some form of insurance (eg. salary/non-profit kpis). So they do that for a while. And as you know whenever you have insurance you have moral hazard (eg. lazy people) so over time management identifies the inefficiencies and calls to go back to profit units. And so the cycle continues.