Wouldn't it be ridiculous if supermarkets were run like public schools?
Teachers unions and their political allies argue that market forces can't supply quality education. According to them, only our existing system—politicized and monopolistic—will do the trick. Yet Americans would find that approach ludicrous if applied to other vital goods or services.
Suppose that groceries were supplied in the same way as K-12 education. Residents of each county would pay taxes on their properties. Nearly half of those tax revenues would then be spent by government officials to build and operate supermarkets. Each family would be assigned to a particular supermarket according to its home address. And each family would get its weekly allotment of groceries—"for free"—from its neighborhood public supermarket.
Private supermarkets would never work! The poor would starve!
(HT: Greg Mankiw.)