I don't know how someone could full time without knowing you lose vacation for a year. In my building they made a combo throw away plane tickets much less a driver. Although I believe his family still went on the trip.
My center manager looked me straight in the eye and asked "do you want to be a driver, or do you want to take a vacation?" If there was any time in my career that I needed a vacation, it would be the first year driving. This is one of those policies that doesn't make a whole lot of sense.