A viral debate about American Social Security has revived an uncomfortable question: if a worker and their employer collectively contribute roughly $10,500 annually toward Social Security, why might that worker’s projected retirement benefit amount to just $31,800 a year, rather than the income potentially generated by investing those contributions privately?

The question, raised in an October 22, 2026, post by Jeremy (@jeremyct) on X, sounds like a straightforward financial comparison. Forty years of contributions would total $420,000 before considering investment returns.…