Such pessimism. It's savings in my view. I fully expect a return on that money, even if (unlikely) only 77% of expected benefit. Those of you who don't only contribute to making it a self-fulfilling prophecy by your apathy in the face of assaults on the program. Considering the program's success in keeping old people out of poverty, that's pretty sad.
If it was organized like a FUNDED pension then I would agree with everything you say, and then it would likely pay out 100%.
It isn't. It's an unfunded program that pays current benefits out of current taxes. Millennials will get less out of it than we put in on average. That is NOT savings. Gen X will likely experience the same problem. That is actually taking money that could be used for retirement saving. Boomers, like every generation before them, will get more out than they put in. They are likely still getting less than they would had they saved that same money with interest.
Social Security had high aspirations when it was created. However, it is unfunded, and voters kept voting themselves better and better benefits without any plan to pay for it. If they do try to fix it they will likely fix it by either raising the retirement age or by increasing taxes, both of which redistribute even more wealth from the young to the old. Or they increase means testing. People with assets get smaller benefits.
To jump in with the people calling it a ponzi scheme. I've had that debate before. It is technically different, but using current income to pay out current benefits does make its structure very similar to a ponzi scheme.