If three institutions are sacred in America, they are motherhood, baseball and Social Security. Any critic of the geometric rise of Social Security payouts is looked upon as a reactionary who would condemn the aged and disabled, the widows and orphans to a life of impecunity on a diet of Alpo. Yet the most articulate critic of this increasingly straitened pension system hardly looks or sounds like a modern Marie Antoinette.
He is Martin Feldstein, a gentle, cherubic fellow, who left the Bronx sidewalks for undergraduate distinction at Harvard and found a home there (with...