> There should be a note on American menus that says "We underpay our staff, so 15-20% tipping is expected."

I was recently in a restaurant that had exactly that. There was a fine print note at the bottom of the menu explaining that because a state law prevented servers from splitting tips with the kitchen staff, a 3% surcharge would be added to the check so that non-tipped staff could "earn a living wage".

https://www.squidlipsgrill.com/wp-content/uploads/2022/01/Sq...