True, that's one possible explanation -- but it seems a stretch to me.
On the other hand, if the actual goal is not to increase the workforce size as such, why not just set up the criteria to reflect what your actual goal are?
That is, if your goal is to prevent "brain drain", why not specifically state the criteria in terms of loss of personnel possessing unique expertise. The criteria as stated would let us be perfectly willing to throw one Feynman under the train in order to save two cafeteria dishwashers.
On the other hand, if the actual goal is not to increase the workforce size as such, why not just set up the criteria to reflect what your actual goal are?
That is, if your goal is to prevent "brain drain", why not specifically state the criteria in terms of loss of personnel possessing unique expertise. The criteria as stated would let us be perfectly willing to throw one Feynman under the train in order to save two cafeteria dishwashers.