The only reason Social Security was not commercialized and killed, was that older people were outraged and organized protest campaigns, letter-writing, calling their Representatives and Senators, etc., and holding forums for other older people to do all these things. It was not because of the "Democrats" who always, nowadays, wait for their Republicans to tell them what to do--"Well, maybe part of it should be privatzed," until you practically have to threaten their lives before they'll stop following their Republican masters. The very first sign of any kind, of the start of a revolt among the American people to all the Republican anti-Government corporate-rule, was this early effort of Bush/Cheney (and "D"LC slaves) to kill Social Security; those old people taught us all how to act and fight, yet again.
Social Security is one of the safest, best-run programs, and is the single most popular Federal program, according to polls. It invests wisely, has a great return on investments--better than the stock market--and very low administrative costs. One of the best explainers of the history, value, and easy fixes for Social Security, is Nancy Altman, author of the book "The Battle for Social Security--From FDR's Vision to Bush's Gamble." She just wrote a great editorial, in the current (April 23, 2008) issue of "Liberal Opinion Week," and available online at
http://www.sltrib.com/opinion/ci_8895618 and called "Another Silent Spring."