A stunning table by healthcare economist John Goodman:

Goodman then explains why the twentysomethings take the hit:

No money has been saved. No investments have been made. No cash has been stashed away in bank vaults. Today’s payroll tax payments are being spent to pay medical bills for today’s retirees. And if any surplus materializes, it’s spent on other government programs. As a result, when today’s workers reach the eligibility age of 65, they will be able to get benefits only if future taxpayers pay (higher) taxes to support them.