A lot of places just multi-task their employees. I can't see why a restaurant would have someone who is just a dedicated busboy unless they are so busy that they can't spare any of the waitresses/waiters to removed used dishes and clean those tables. I know at Golden Corral and a bunch of other restaurants I been to the waiters/waitresses removed those dirty dishes and clean the tables.

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"There can be no divided allegiance here. Any man who says he is an American, but something else also, isn’t an American at all. We have room for but one flag, the American flag… We have room for but one language here, and that is the English language… and we have room for but one sole loyalty and that is a loyalty to the American people.”—Theodore Roosevelt