Example: In the Brin novel The Postman, the narrator acquires the eponymous uniform from the corpse of a "neo-hippie" who had himself taken up the duty of delivering the mail. There is some reflection on the apparent contradiction of an anti-establishment type putting on a uniform and volunteering to serve The Man, but on the other hand, that a lot of hippies are very civic-minded volunteerists.

(I first read it as a 3-part serial in Isaac Asimov's Science Fiction Magazine, a long time ago; my memory is a bit spotty. I hope another Troper will take this up for a proper entry.)