The busboy was the one who made sure the meal was delivered as soon as possible with the proper stuff. The waiter had no part in the food or drink delivery.
Even if "it's a lot harder than it seems" (which really, what?) it's not 90% more work the busboy was doing... remember the busboy also buses the tables. Answering a few questions about the menu is not significantly more difficult than clearing tables.
(Then there's the places where the kitchen staff brings out the food...or they have "runners" who are responsible for bringing out the food.... really, I hate to generalize but as a group servers have a seriously inflated sense of importance, restaurant service is a team effort)
Even if "it's a lot harder than it seems" (which really, what?) it's not 90% more work the busboy was doing... remember the busboy also buses the tables. Answering a few questions about the menu is not significantly more difficult than clearing tables.
(Then there's the places where the kitchen staff brings out the food...or they have "runners" who are responsible for bringing out the food.... really, I hate to generalize but as a group servers have a seriously inflated sense of importance, restaurant service is a team effort)