In order for George Bush to show the viability of his Social Security Initiative, I propose that he lead by example.
Every president receives a $400,000 per year lifetime stipend. If George believes so strongly in the "Ownership Society", then he should agree to "investing" the same portion of his future proceeds as he's asking Americans to invest theirs.
As Mr. Bush is already a millionaire and very likely to remain one for the rest of his life, this action would be purely symbolic. It would however demonstrate one aspect of leadership: not asking your troops to do anything you wouldn't do yourself.