I am watching c-span and the question about mismanagement in the post office was asked. The question was side stepped.
In our area the people promoted over the years have been craft employees with terrible work histories, friends of the manager choosing the candidates, or boyfriends/ girlfriends of the manager doing the choosing. This is a well known problem in our area. I have seen people passed over with business degrees, and great work histories.
Leadership starts with the first line supervisors and if they are like the ones we have then we have already failed.