Of course you recognize the fallacy of that argument. Try delivering a gallon of gas to each and every home 6 days a week and see if the 11 cents holds up.
Try delivering a gallon of gas to each and every home 6 days a week Also, that would be a specific, individual gallon of gas. Can't get my gas mixed up with my neighbor's.
I'm not the USPS' biggest fan, but I still think that what they pull off on a daily basis is pretty amazing.