It’s a trope in survivalist fiction. The contractors hired to build a bunker are often the first to attempt a breach once a crisis hits.

I somewhat agree but if I get contractors they will likely be coming from one or two states away. If the fecal matter is splattering the fan it is unlikely they will make it this far. I will also have the design reviewed by multiple third parties to identify security weaknesses and have those addressed as part of the contracts. And then of course there will be party poppers long before they get close.

This is all just fantasy of course as I have not yet found a highly rated company within a few states that have vast experience with upper-end UHPC 60K PSI which has to be done right the first time and I need to get the designs baked first addressing all the "Errm Achtuwallly" memes.

Other comments talk about society collapsing. I am totally fine with that. I will set up a copy of HN and make silly comments on it then as admin give myself points and reply using alternate accounts. Then I will start some contrarian arguments and then ragebait the contrarian personality. Another personality will step in and calm everything down. Then 48 hours later another alt will make a totally unrelated comment and just after that there will be spam for bitcoin in Uganda. All of this powered by the Sun and my farts. Some poor bastard will happen across this site on internet over CB radio.

Yes, everyone who works on the bunker will know about it; and all these billionaires are trying to build their survivalist camps but dont actually consider any of the easily/practically broken parts of society they implicitly rely on.

Realistically, society we know it won't survive if it dwindles to beneath a couple of millions.