Restaurants handle this issue in many different ways. I have been to several who explicitly state that all tips are divided & shared among all employees, and I think this is a good model. I've also seen one with a separate tip jar for kitchen staff, which may be a better option in some places. Really, why should the server make more than the cook or the dishwasher? Are they actually working harder? [I know, their wages are often structured differently, but I question whether they should be.]