PDT 2/2 : Why has tipping increased?

[El Diablo]

All,

Jared asked me to elaborate. Among other things.

a) there is not a fixed service fee in america
b) customers do not know how much dishwashers get paid
c) customers do not give a [censored] about ratio of waiter:dishwasher pay
d) minimum wage has increased at rate far below rate of restaurant price increase