quote from http://www.thesimpledollar.com/2010/02/12/the-minimal-tip/
First, it seems really unfair to give a 15% tip to someone who isn’t
even providing minimal service and then giving a 20 or 25% tip to
someone busting it and doing five times the work to make your meal
enjoyable. I don’t think it’s reasonable to hand out 40-50% tips to
people who are really striving to do a good job so you can amply reward
them in comparison to people not doing their job at all.
Second, some businesses collect
