Why not? Virtually all government workers at every level, have a system that invests money for their retirement. Those people don't have to know much either. Why is it OK for them and not for us? How about if we could invest only in MITTS? Guaranteed no loss of capital for the year but participates in a part of an index if it does go up. Or just gov bonds? They pay principal and interest when held to maturity, or zero coupon bonds? All are better than the 0% return on SS.