simonyuen

Not quite that, but close enough that I should disclose I wrote one: ENOF. It starts as a real-world quest game in SF and slowly becomes the government. Instead of an AI voting as you, everyone names a person whose judgment they'd accept, and those delegations chain together into what people start calling the respect graph. You can revoke yours instantly, and a lot of the book is about what goes wrong anyway: bought delegations, one schoolteacher in Lagos ending up with eleven million votes behind her, and eventually who gets the authority to turn the whole thing off. It's on Gumroad now (DRM-free EPUB/PDF): https://simonyuen.gumroad.com/l/enof, Kindle once Amazon finishes processing it.

Seconding Franchise, though. Asimov got to the "one voter stands in for everyone" version in 1955.