"A hell of a gift, an opportunity." "Magnanimous." "One of the greatest advantages I ever experienced." These are the voices of World War II veterans, lavishing praise on their beloved G.I. Bill. Transcending boundaries of class and race, the Bill enabled a sizable portion of the hallowed "greatest generation" to gain vocational training or to attend college or graduate school at government expense. Its beneficiaries had grown up during the Depression,...