It is easier and cheaper to save themselves than to save the world. Not that they can do either.

I once imagined a story about a billionaire who build his walled getaway community with a large and powerful security force.

When society broke down and the Billionaire and his cadre sheltered in the getaway, his chief of security took the Billionaire's family hostage and demanded all the security override codes.

I imagined a bunch of different ploy twists and various endings. None were good for the Billionaire.