The other day, it happened.
My son asked me the "question." The one you know a kid will ask someday, but you hope that they won't.
We were driving in the car, and there it came, out of nowhere: "Dad....why didn't the Skipper and the others just KILL Gilligan? They would have gotten off the island."
Anyway, you can also check this about the economics of monetary policy and the island of the Gilligan.
(Nod to J.M.P.P., who is a link in the chain of life)