Also the tiny tiny percentage of cases where this doesn’t happen will just mean that the combined forces of the former guards from the other bunkers come kill everyone and take their stuff by force.
Astonishing level of self-delusion by people to think they can use their position of wealth and power in one society to protect themselves and maintain that wealth and power if they cause that society to entirely fail.
Ultimately, most of these people have that wealth and power because they are so frightened and insecure that they cannot let a moment pass without fighting and clawing to have more power as a false sense of security.