Kerry's investments are the result of John Heinz' death. A death benefit which is not granted to survivors of Social Security donors.
Think about it;)
Living off of another man's money, but what is even more ironic is that John Heinz didn't actually generate the fortune himself, either. One would have to go back to Heinz's father and/or grandfather. So Kerry & Tootsie are living it up (way up!) on a 100 year old fortune, not one penny of which either one of them are credited with having created.