If you have this kind of money just import workers from far enough away that they could never make it to the bunker in time.

there’s a joke in poor taste to be made here about laborers in…

you know what, never mind. let’s just get to the point.

for someone with this kind of money, bringing people from far enough away, geographically, culturally, and economically, would be a viable means of isolating them, and even silencing them.