I don't understand tipping in North America- apparently it's the biggest source of income for waiters/ tour guides etc. However all these people are employed. Isn't it up to the employer to pay them an adequate wage then the tip would be just that - an additional amount given if the customer thinks they received exceptional service. If it's a compulsory payment it's not a tip 🤔. Does anyone know the logic behind the N American way of thinking?