I always thought the USPS would be the perfect agency for more public outreach and goverment-citizen interaction.
It sounds weird when its stated, but they are the only government entity that sends an employee to your house 6 times a week. It could quickly turn distopian but I could imagine the mailman becoming your single stop for interacting with the government and its services.
(+) yes, yes, we all know that the "government" part of USPS is a bit strange, albeit not as strange as Amtrak.