“…Customer knowledge of poor labour conditions, it has been argued, will lead to more generous tips, as income inequality is considered a factor increasing gratuities (Azar, 2010). The size of tips is also influenced by food prices: Where the perceived cost of eating out is reduced as service charges are not included in menu prices, this is likely to increase the overall interest in restaurant visits, and hence the overall amount of money spent on food services (Lynn, 2018, Lynn & Wang, 2013). Yet, as service workers are unlikely to tax all of their gratuities, as originally postulated by Hemenway (1993), social welfare effects have to be measured in considering their complexity, such as the additional (untaxed) income effects vis-à-vis the cost of health or unemployment insurance losses, or foregone payments to pension funds.…”