Well, pizza delivery is a service job, meaning they get paid for their service. If they perform well, they should be paid well. If they perform poorly, they are paid poorly. Their payscale is made up of an hourly wage for their time, mileage for wear on their car, and tips for their service. Therefore, they earn their tip money. If you think "straight up dude, fuk tips," you shouldn't be ordering pizza. They are just trying to make an honest living. (asian thinking)