I pretty libertarian and I think some people can confuse privatization as being always libertarian. The problem is you can't have privatization without some amount of corruption / corporate welfare which will then lobby more effectively that a government agency for more funding. The right answer is to just cut the program. Don't privatize the post office. Just get rid of it. Let people own their mailbox and let them send letters to each other via a private service. IDK, maybe the postal system really only exists to make it easier for the government to get a hold of you. In which case I say double get rid of it.