Hypothesis: Jeff Bezos is Ozymandias from The Watchmen and he bought the WaPo to prod Trump into forcing Amazon to build an alternative to the postal delivery system without triggering public alarms? Amazon will build the Uber of delivery, and Trump draws the flak for it.
The image of Uber is beside the point imho. It is about the replacement of fixed transportation supply and prices by a self regulating system. Amazon might auction off deliveries to individuals and small enterprises that will bring their own trucks.