I agree that there is a parallel between governments and corporations multiplying surveillance and preppers impractically multiplying gadgets. I perceive both to be responding to some sort of psychological issue relating to control or insecurity, not to be practically pursuing resilience.

A government with aggressive surveillance ambitions but a decaying police department and justice system looks to me very much like the guy with a mountain of guns and ammo but no parallel investment in something like battlefield medicine. Whatever you're telling yourself about the reason for what you're doing, it is manifestly not correct, at least going by other investments I would expect to see and find neglected.

It's not that they'll be able to call on one another - you can't guarantee who else will be around after The Bad Event (whatever it is).

It's that they don't have the basic strength of building alliances in the first place - something every kid is supposed to learn through the joys and pains of playing together. Bullies are not generally the popular ones, but neither are the loners.

To put it another way: castles can't survive siege forever. They are a delaying tactic until outside help can arrive.

"The Dauphin, whom of succors we entreated, Returns us that his powers are yet not ready To raise so great a siege. Therefore, great king, We yield our town and lives to thy soft mercy." -- Henry V, Act 3, scene 3

This is extremely salient. Check out Phoenix, AZ sometime in street view. It's a brutalist grid of wide roads (even in "residential zones") where every property is lined in a six-foot block wall. As a result, sight lines are excellent for drivers (encouraging high speeds) but terrible for homeowners. Kids can't reasonably roam free, neighbors rarely meet, and everyone is viewed with suspicion. Most of my neighbors are really decent people, but I see them so rarely we might as live in different cities.