It would be really interesting to study The Post Office in particular. Something about this organisation attracts some very sour people. Or perhaps they weren’t always like this but have become so in my adult lifetime over the last few decades?
In the early 2000s there was a TV ad campaign for “The People’s Post Office” where the sub-postmaster role was played by John Henshaw, a character actor known for playing hard bastards and, in his most recent role on The Cops, an exploitative bent copper from Bradford. A strange but apt piece of casting.