if saturday delivery were to end, who do you think would deliver the mail on a regular carriers vacation day or worse yet, a day when they call in sick. some offices have only one or two substitute carriers and if they only work when the regular carrier is off of work, it would be very hard to keep "substitute" carriers as they would have no pay unless the regular carrier is on vacation (predictable) or calls in sick (unpredictable). now i don't know about you, but if i were a substitute carrier, who would normally work every saturday, i would have to have an income from somewhere in between those times i would have to work at the post office, meaning they would all probably get a different job and when called upon to deliver mail in a pinch, they would be "working" to make a living, so that day may not get delivery also. wouldn't that be even worse on the postal service? just my thoughts, but it really should be seen in that perspective. i couldn't just wait by my phone everyday, hoping it would be the post office calling me to go to work. i would have to get a different job and when they did call, i'd have to say "sorry, i'm at work". think about it a little bit.