This is a gross generalization. Not everyone was a solidly middle class worker for their entire lifetime, and not everyone thought to save for retirement. Before you studied it, did you have any idea at all how expensive retirement would be?
Think about it: If someone didn't save their whole life because they assumed social security would provide for a good life, but then they discover that SS hasn't been increasing much at all and the quality of life SS provides is terrible, what are they supposed to do? Suffer? Just because a portion of their generation saved?