regarding the attitude of 'they are just minimum wage clerks, cut them some slack'
I don't but that line. Wal-mart could pay more and attract a better quality checkout person, but they choose not to. I am not going to bend over backwards to make things easier so walmart or whoever can save money and line their own pockets.
Walmart and many others decided to push small businesses out, well it was small businesses that used to have good customer service, and it was probably the owner or family that ran the cash register. I'd give a place like that back some change if they overpaid me, but normally they are smart enough not to. At walmart if the machine chugs out more change than it is supposed to, or rolls out some susan b anthonys instead of quarters, my attitude is 'walmart payed some company tons to figure out how much a $5.00 clerk would loose in mistakes vs how much a $7.00 clerk who never made a mistake would cost, they chose the $5.00 with their eyes wide open to the facts, and were willing to accept the minor losses and mistakes, and even drive away customers, so who am I to mess with their system. If i get overpayed back in change, it's what walmart chose to do'