Actually they would notice. The average franchise owner nets $150k/store/year on $2-3M in sales, not including the initial investment. Which puts their profit margin in the single digits. Ruthless!How Much McDonald's Franchise Owners Really Make Per Year - Mashed
McDonald's is the most successful restaurant in the history of the world. How much does a McDonald's franchise owner really make each year?www.mashed.com
To pay a living wage (which amounts to how much exactly?) would absolutely require raising wages, to the point where people will simply spend less money there because the price increases far exceeds the value of the food, and/or owners will cut hours and invest in labor saving machinery to compensate. Labor accounts for 25-30% of the overhead, therefore an hourly pay increase of $5-10/hr would absolutely have an effect.
Math is hard.
Then given how low the profit margins are, they aren’t doing a very good job at it. The facts don’t match your feels.
in other words, profit margins are predicated on exploitation of cheap labor.