I find it rather difficult to believe that any middle managers in the Federal Government are capable of running businesses, and as for college degrees, wouldn’t those be required as baseline?
The typical Postmaster General is usually a businessman ~ my favorite was Bobby Tisch ~ gave me more pay raises than I can count. Klassen wasn't too bad in that regard either. Sometimes you have a career government employee ~ our best Postmaster General in a century was Bill Bolger.
These folks all have subordinates, and many of them come from business and industry, some from the government, some from inside USPS ~ and all the way down.
My immediate boss for over a decade had been at USPS then went out to IBM and then came back ~ supposed to have given him some fresh ideas.
The average age of entry into a federal government job is 35, not 19 as in the private sector.