Excerpt: Is privatization necessary? Preferable? Politically viable? In January, with Bush's second inaugural in the offing, Reason invited James K. Glassman, a fellow at the American Enterprise Institute and host of TechCentralStation.com, to discuss and debate the ins and outs of Social Security reform with Tyler Cowen, the Holbert C. Harris professor of economics and director of the Mercatus Center at George Mason University.