Wrong. The dues go down if the “U” level employees are let go. They cover the routes of those employees who have the day off. Six days per week delivery equals one “regular” postal employee being out one day of the week. Five week delivery means that no such coverage is needed.
I know one eight year USPS carrier who will lose their job if Saturday delivery is eliminated. His last position, in IT, was eliminated when his office was outsourced to India.
First off, businesses aren't even delivered to on Saturday, which means the only delivery segment of consequence is residential. Secondly, you have employees who, on the average, account for 4.5 days of work time available per week ~ not 5.0. Additional employees are ALWAYS required to cover that additional .5 days.
The big savings is in higher level supervisors no longer needed, distribution personnel who don't need to be around on early Saturday morning ~ and motor vehicles and gasoline that won't be used.
It ends up not being a really significant drop in personnel ~