Does the postal service only have value to you if it delivers 100B pieces of "useful" mail a year, according to some metric of useful? Even if I somehow thought the same way there is no version of a plan where I trust someone in government (or not in government) to decide what mail has value to me. This seems like such a dead end take. Yes junk mail is crappy, just like lots of other worthwhile tradeoffs when designing massive scale policy.