They can, and should, start with making everyone more accountable. How about tracking systems that work? And when a piece of mail that has a tracking number doesn’t get delivered, how about something more than a “we’ll get back to you in a month or so, but we probably won’t know where it went.”
I have, in the past year, received multiple pieces of mail that show as undelivered in the USPS system. Likewise, there are more than a few that never showed up at my mail drop that they claim were delivered - when no mail courier ever appeared.
Meanwhile, tracking of UPS, FedEx and even DHL packages has been 100% accurate in the sense that they know where the package was delivered and where it might have gone “off the grid” as a place to start looking for it.
USPS don’t want accountability. The USPS “POD” is a complete joke. Fedex can track an envelope from Osaka to Memphis to PNG and they can tell you exactly where it scanned in at each point. USPS personnel apparently couldn’t find their asses with both hands and a road map, much less find your “Priority” envelope.