Who said manage? I'm talking of forced contributions to their own retirement account, with similar ruled to SS.
Maybe 3 choices on how it is invested is all. Contributions would be mandatory through payroll taxes - but to an individual's account. Then when they reach 65 it pays out according what they want, between 1 and 1.5x the RMD calculation for private plans based on their desires. Whatever is left at death goes to their heirs tax free.
The idea of tax current workers and give it to current retirees is criminal - actually, if a company did that it would be criminal. Only the government can have unfunded liabilities like that.