The underpinning to this issue is that these jobs aren't actually necessary. If the population was going to starve if that crop wasn't harvested, or if the popu

The underpinning to this issue is that these jobs aren't actually necessary. If the population was going to starve if that crop wasn't harvested, or if the population was going to die without that flight, the money to find farmhands/pilots would appear pretty quickly. But luxuries are only desirable up to a certain price point. We don't normally do work for the sake of working. We work to provide what people want, at a price that is agreeable to all parties. If an agreeable price isn't found, it means not that we need to find people, it means the work to be provided isn't really wanted by anyone in the first place.