Right‽

Which is why they had to get “no tax on tips” passed because can’t underreport tips like they used to when it was all cash.

Agreed; in Europe the price on the shelf is what you pay at the register. In the US, sales tax still hasn’t been added in to the price displayed on the shelf so it’s anyone’s guess what the actual price is.

… so you can save 20% on your bill?

In this economy? 15% is the new 20%.