I've worked many years as tour guide for Americans and tips are usually a part of my income. I've done some work for a company that included all tips in their price and paid me a much higher wage. It was better for me and the tour members. The group would still give me cards with nice comments on them at the end of the trip, but they didn't have to worry about what tips to give me and others. I was motivated to work just as hard as group members' comments about my performance were published online and had a bearing on getting more work.

There might be a market in the US for all service included restaurants or hotels (with higher wages paid to staff), but most consumers would chose the lower sticker price even if they ended paying the same or more in the end.