I believe it is true that Social Security is in need for reform. I am conservative enough to think that there should be no such thing as social security as a form of retirement savings, maybe it would be ok as a bit of a safty net for those who can't work or are mentally handicapped etc. That is another discussion for another time.
As a country we do have a commitment to those who have retired or are planning on retiring soon and their retirment plans included the current system.
Congressman Paul Ryan of Wisconsin has the best plan I have seen so far. You can find some details at his web site.