Considered alone, it will have the potential to slow hiring for up to a 5-yr period (other factors will have longer impacts). Think of it as a 5-gal bucket of water, if you continue to pour 1-gal/hour into a full bucket, 1-gal/hr will spill out. If you suddenly increase the capacity to 10-gal, the outflow is affected until the 10-gal point is reached, then the outflow will resume at 1-gal/hr again. It isn't an exact analogy since you are actually drawing pilots from the bucket and replacing them with new pilots, but you did stop the potential outflow for 5-yrs (although there will not be 100% takers).