Re: Rock, hard place etc.
From a Sci-Fi novel written 60+ years ago:
Assistant director of big physics institute goes into boss's office to find him holding his head in his hands. When asked what is wrong, the Director says "Joe just quit." The AB says "but Joe's just the janitor, why are you so upset?"
The Boss looks out his window at the dozens of physicists roaming the lab floor and says "I can replace any of these people tomorrow, but do you realize how hard it is to hire a good janitor!?"