Need an actuary and a day to formalise the actual risk...
Just by looking at it they are making money because they investing money with institutions that are taking there money and investing it... This is then about risk, they are OK in a smaller set up and cost should be covered somewhat...
What happens if these institutions goes bust and they do...
Sorry there is no free money out there and the social security has to be more risk adverse. You seem to be happy with being riskier with your retirement plan, which is your choice but if it goes tits up, it is the Government that pick up the tab..