Like the efficiency of waiting in line at the post office just to buy one stamp? I went last week and our post office doesn’t have an automated stamp vending machine. There were 3 people in line ahead of me with no more than two packages each; two clerks were working. I stood for twenty minutes before I got my turn. All told, it took nearly 25 minutes to buy a 44 cent stamp.
With UPS I can just print a label and stick it on my doorstep after filling out a form online.
Just because the post office is the most efficient in the world doesn’t make it efficient.
Isn’t buying stamps online efficient enough for you?