You aren't wrong, but the solution should be to just cover the expenses of the USPS upfront with tax money instead of allowing them to take in funding by contributing to the destruction of our planet and stuffing all our mailboxes with literal trash.

The USPS is an amazing service that absolutely deserves to be funded, but as long as we're paying for it, let's choose a method that would mean finally putting an end to all the crap in our mailboxes and eliminating all the waste in energy and resources spent carrying it all from the post office to the mailbox to the landfill.