The glories of free-market capitalism are capacious, writes A. Barton Hinkle. It has lifted hundreds of millions of people from bare subsistence to astonishing wealth. It has given us life-saving medical marvels, grocery shelves groaning with plenty, and phones that let you dial long-distance in the middle of a cornfield. Better yet, it has done it all without the help of a central planning board. The fact that some of us want to enjoy various flavors of potato chips means that our local chip aisle will contain a dazzling bounty.