I think this is brilliant, but I’m interested to hear criticisms or arguments against it.
Well, the biggest argument against it will be a need to find and train a temporary replacement for the person. For many positions finding and training alone may take longer than that. And then what do you do with the replacement once the original guy is back? Overall though, I would agree that benefits overweight potential problems.
A possible argument against the system is that there are many temp working contracts to fill in for the fulltimers on leave.