With another Democratic candidate debate on tap in Nevada later today, you can bet Barack Obama is going to get questions about his proposal for modifying the cap on income subject to Social Security payroll taxes. But it's important to understand why this is such a big deal for a lot of progressive Democrats. His proposal isn't the controversial thing (though it certainly would be in a general election campaign, where it would be hammered by Republicans as a tax increase); it's his decision to raise the subject at all, and particularly his use of the word "crisis" to describe the status of the Social Security system.
The immediate reason for this reaction is obvious enough; by the well-earned end of Bush's 2005 drive to divert payroll tax funds to create private retirement accounts, Democratic critics of his plan were devoting just as much time denying there was a Social Security solvency problem as they were attacking the plan's baleful consequences. So ironically, a proposal by Obama that's "Left" in terms of its specifics (avoiding any benefit changes while making the payroll tax burden more progressive) is drawing fire from the Left itself as a heretical concession to the rationale for Bush's proposal, and to those much-derided "Centrist" media types who like to talk about entitlement reform. And for that reason, the reaction among left-bent Democrats to Obama's Social Security rap provides a microcosm of the exquisite ambivalence they are experiencing over the Obama candidacy in its entirety.