You misinterpret.. My comment had a very specific list of middle-tier fast food joints that have gone to crap.
McDonald's wasn't in that list. Neither was Taco Bell. Both very affordable, and still pretty consistent.
But if you're going to call me out on classism, it's a fairly ironic position to take that fast food is some sort of special charity to the poor. A far more charitable approach would be embracing publicly-subsidized grocery stores in food deserts rather than letting private equity slumlords peddle sugary deep fried dog food as if it's the only game in town.