Is Social Security a Ponzi Scheme?
businessweek.com
businessweek.com
I really don't buy the author's assumption of infinite growth. Also, the comments on that site are completely batshit insane. So many people are incredibly angry at "corporations".
Also remember that Ponzi schemes work because people are greedy, and want to get rich quick - nobody gets rich from Social Security. This ties into the first point, because the need to make people rich fast means that a Ponzi scheme can't just simply reduce payouts without causing the whole pyramid to collapse.