Because staff prefers tips over a liveable wage. Perhaps, other countries can experiment with America's way and let the staff decide for itself? For example -

Because staff prefers tips over a liveable wage. Perhaps, other countries can experiment with America's way and let the staff decide for itself? For example - "The restaurant industry in America is unique, and survey data proves that both tipped workers and the public prefer it as well. Restaurant workers often look at ourselves as commission-based sales people..." (https://www.restaurantworkersofamerica.org/faq https://www.restaurantworkersofamerica.org/faq) "The switch to a no-tip, 25%-surcharge model at world-famous Zuni Cafe has done wonders for the wages of kitchen staff. But very few of the veteran servers remain who worked at the restaurant when the tips were taken away, and those who work there now are still complaining." (https://sfist.com/2022/07/28/90-of-zuni-servers-have-left-the-restaurant-due-to-no-tipping-policy-policy-may-still-be-revised/ https://sfist.com/2022/07/28/90-of-zuni-servers-have-left-th...)