Columnist Steve Chapman has their number:
People don’t like cheap, tasty, high-calorie fare because McDonald’s offers it. McDonald’s offers it because people like it. … We live in an age of inexpensive, abundant food carefully designed to please the mass palate. Most of us, recalling the scarcity, dietary monotony and starvation that afflicted our ancestors for hundreds of millennia, count that as progress. But those determined to save human beings from their own alleged folly see it as catastrophic.