One nice thing about the tip system, is that it is OK to do your own thing when it wasn't busy. For example, I never minded working Sundays. They were usually slow, but I brought in my school books. I would study in the side room in between waiting tables. And, really, I made enough money that I didn't particularly worry about an occasional slow period. This was back in the very late-80's to early 90's. In a 4-hour evening shift I made $60 - $100. Sundays I might make $30 - $50. That was a full day but they fed me spaghetti and cheesy garlic bread and I got a lot of homework done. Lunch was even more lucrative, but I wasn't fast enough to handle it.
I say this because I get the impression that some people feel sorry for the abused waitstaff out there. When, it is good, desirable job for someone that is unskilled but eager. The only reason I stopped was that it made my RLS worse and I was having trouble sleeping.