>First the amounts won't end up nice and round at particular hot button price points Why? The price is designed to end up that way, if people will have to add

>First the amounts won't end up nice and round at particular hot button price points Why? The price is designed to end up that way, if people will have to add 15% on every item they will modify their cost structure. >airline tickets yes if I want to add a service I pay, but in a restaurant I don't have the option to be served without the waiter, so it's not fair to the consumer that has the right to know how much he has to pay when he orders something. When a book a ticket the full price is displayed before I make the purchase, not after I used the service. Also for the waiter lobster and champagne require the same effort of soup and tap water, so it's not like adding a language of 15 or 20 kg.