If they invested the money in a 401k instead, the social security taxes would still go to current retirees by bidding up inflated asset prices. Building more ca

If they invested the money in a 401k instead, the social security taxes would still go to current retirees by bidding up inflated asset prices. Building more cars in 1990 does not cause there to be more total nursing care in 2020, all your proposal does is change how retiree income is distributed.