The drugstore owner was delighted: his shop was thriving and he was richer than he had ever been. He felt he owed his success to his handsome young apothecary, who, he thought, was indispensable. After all, he was just a boss, and he himself knew nothing about pharmacy.
With extra money came ambitious new ideas. The owner took it into his mind to start selling another kind of drugs. His apothecary was reluctant to participate, but the owner offered the young man a special bonus now and then, and after that, the going was smoother. The store was bustling—not only with prescriptions, but with new clients.
In the end, though, the conscience of the idealistic young apothecary got the better of his greed, and he threw down his pills and his joints and left. More than that, he warned his colleagues in the area about this unsavory “job opening,” so no new applicants came.

The Boss finally realized just how indispensable the now-former pharmacist was: his medicines, and his drugs, were now indispensable too.