Yes, the U.S. Postal Service needs a change, not necessarily in the method of delivery but in the area of management.
In the early 1980s, a national survey was conducted on the national average of supervisors per employee. The average came up 1 supervisor per 18 to 21 employees. This was also conducted in the postal service and it came up 1 supervisor per six to eight workers.
There have also been reported pilot programs, such as having no postmaster or supervisor in the office, with the office managed by regular workers. They found less sick leave and higher mail output. Another program was to move all of the boxes to one side of the street. This also proved to be efficient, but never really implemented.
Ask any postal worker not in the management side of the house and they will tell the same stories. Once you become a manager or supervisor, it is as though they are vested so as to not lose their job and in some instances even promoted, sometimes beyond what they are capable of or qualified for.
Always remember, the mail carrier are the eyes and ears of their community. With 27½ years and quit!