"A recent survey by the National Association of State Retirement Administrators found the nation's largest pension systems were collectively facing a $267 billion shortfall. A separate study released last month by Wilshire Associates, a consulting firm, found that the asset shortfall for state pension plans was worse than for corporate plans."
http://www.nytimes.com/2005/05/01/weekinreview/01dao.html?I am fortunate in that I have been in TIAA-CREF since 1967 so I should be OK barring a major inflation or a general economic collapse.
There is no good economic reason why young people should not have the option to choose fully funded, vested guaranteed benefit retirement plans to retire early, if they choose to put that much aside. There are risks in guaranteed benefit plans, but we know how to manage risk today, with very sophisiticate methods -- and most Americans can afford early retirement if they choose it.
But even if we had that, two facts would remain. First, we will need a safety net to protect people from being poor when they are two old to work. That's the task of social security. Second, some of us old geezers are going to be stuck with the best choice we could make from the options we were given 40 years ago. Until someone invents a time machine, anyway. And when the promises we were made are not honored, we are wronged.