SS is paid for by higher wages, which happens when there are less workers, not more. And then there will also be less to support in the future. The solvency of a fund depends on future outlays, not just cash flow. Do they think we should increase population exponentially forever?
I see a lot of shilling for policies to increase mostly low-income populations. I can’t imagine that they believe their own theories. But I can imagine that they benefit from them. Fancy that; somebody wants you to work more and get less.