Just outta curiousity: Why do you say that American "Social security needs to be modified, no doubt. If its not changed, its going to be a huge disaster"?
I'm not laying a trap or anything; I'm no expert on SS. But my sneaking suspicion is that a lot of rhetoric whereby it's become a received view that SS needs to be "fixed" was politically motivated. Certainly I've not yet seen any serious attempt to demonstrate the fact, and I've seen a good deal of shenanigans in the non-serious attempts. See today's (or rather yesterday's)
Daily Howler, for instance -- the second story on the page. (For finding the link subsequently, that'll be the DH from Tuesday Jan 4 2005, once you get to Somerby's site).
[Edit: Now that today's (Wed. Jan 5) Daily Howler is up, I see that it too is about SS]