Looks to me like they were referring to investing a part of the SS Ponzi fund proceeds in the stock market, not just treasury notes, not instituting private accounts for individuals....
The point is they were saying 6 years ago Social Security is in Crisis, they are now saying people who say Social Security is in Crisis now are lying, just like WMD's in Iraq.
When they said Sadaam had them and we needed to get rid of him that was fine and don't question it. When someone else says it a couple of years later their liars.
Bush wants to use the private sector investments to get a better rate of return and so did they.