The mail volume on Saturday is no less than any other day of the week. Ending Saturday delivery will only add to Monday's delivery which is already the biggest volume day of the week. The labor saved from Saturday will have to be added to Monday or the mail won't be delivered till Tuesday or even Wednesday.
The people in the article are understandably ridiculed, but, ending Saturday delivery is a false economy.
I disagree with your comments.
Mail should be delivered 3 days a week, Mon, Wed, and Friday and if one of those is a holiday, then substitute Saturday.
Snail mail is a dying business (similar to newspapers) and needs to restructure to be in synch with their new size.
Almost nothing of critical (next day) time value goes in the mail these days anyway.