I have had the same experience you had. My mother ran a deli in a middle class neighborhood and she couldn't sell enough $8-10 subs which had higher quality meats so she made a cheaper option with cheaper meats the $5 option which really brought out the worst in people. They would complain how we didn't use the same high quality meats and cheeses and how we would charge extra for adding more then 4 toppings. I did the math and the margins where literally zero, she was running a charity for the community and being berated for it. She sold the place recently and if she gets back in the business she wont be the low cost leader, even though it is the kind of place she wants to run.