I have this cheap B movie in my head with a primitive people living on an island. They compete in hunting, fishing, building boats, houses, cutting trees, growing crops etc they use sea shells as currency. Someone finds a spot with countless sea shells, 95% of the population spends their days digging up more and more. Almost everyone is insanely rich, everyone except from the dumb people still hunting, fishing, building boats, houses, cutting trees, growing crops etc