What concerns me is the possibility of a zero-trust society that nonetheless shambles onward by having a lot of law enforcement. It's kind of like that in Russia, where you're often buying adulterated foods at the grocery store, but there is nothing you can do about it and the mafia (a.k.a. the government) won't let it get bad enough to outright kill everyone. So, it goes on forever. China might be another example, where the history of communism followed by capitalism under cultural authoritarianism has virtually eliminated the social fabric, but the system clings on through extraordinary measures.
In fact, if you look at these "low-trust" societies, all of them have some reason why they haven't been replaced by the high-trust subcultures that you mentioned, reasons usually involving guns.
In fact, if you look at these "low-trust" societies, all of them have some reason why they haven't been replaced by the high-trust subcultures that you mentioned, reasons usually involving guns.