Labour in restaurants does not scale well. Servers can only serve x tables, chefs and cooks can only make x meals per hour. Valets, barmen, bussboys all scale

Labour in restaurants does not scale well. Servers can only serve x tables, chefs and cooks can only make x meals per hour. Valets, barmen, bussboys all scale pretty linearly. Plus rent doesn't scale well either. More meals translates to more staff, more staff translates to more space. And that's also linear. Food-scale happens in factories, think frozen meals in your supermarket not restaurants.