 The GOP says it can protect Social Security and Medicare with no cuts, which sounds pretty good to Alicia Minnell, director of the Center for Retirement Research at Boston College. But I'm also a realist. For years, Minnell says those programs have been paying out more in benefits than they bring in via payroll taxes, partly due to Americans having fewer kids and living longer. So the only way to keep entitlement programs solvent without cutting benefits...