[firethief]

Proportional tipping is much better at aligning the waiters' interests with the restaurant's than a flat tipping model would be; better customers get better service.

[wolco]

Wouldn't tipping some amount before give better service than tipping after? What if tipping was related to the number of services and/or difficulity of each service?

[hacking_again]

In my experience, customers that are friendly and treat the staff like equals get better service.