In fact, I would NOT expect the post office to spend millions in technology to track letters. They shouldn't have any INTEREST in doing that - it isn't important to their main function of delivering mail.
I expected them to use tech to better be able read zip codes & route more efficiently, and to count mail to better place people and resources where most needed.It should stop at that.
Simply because something is public does not mean the govt should be spending resources tracking and storing it