The arithmetic is the same and simple: say, you pay $1,000 per stay (a week) in the resort and then pay $100 as tip, and the wage of a person who get your tip is $30,000 per year or $2,500 per month plus your $100 tip making it total $2,600; now, instead you pay $1,100 per stay (including tips invisible to you) - in the latter case, the wage of a person (who would get $100 tip in the former case) would increase by the same amount which is $100 per week bringing it to $2,600.