You know what I hate? People paying cash for lunch. Basically everyone at lunch swipes their card. It takes like two seconds to pay. A few people to decide to pay with cash. They dig for it in their purses, wallets, and pockets, pulling out individual bills and dimes, and they take as long to pay as about a dozen reasonable people. It's far, far more work than just having a few bucks deducted from each paycheck to cover your lunch—money that can be withdrawn and refunded, in case you thought maybe it was somehow risky for them to do so.
It's pretty much exactly like that Visa commercial where the slow person in line holds up the entire cafeteria while he pays with cash. That commercial really hits home.