Where did you get the $13.4 T from?
Even if the SSTF contained cash instead of $2.4 trillion in interest bearing, non-market T-bills, SS would still go broke. It is not sustainable from an actuarial standpoint. You must either cut benefits or increase taxes or some combination thereof to keep it going.
SS is a pay as you go system. Today's workers pay for today's retirees. SS has been running in the red since 2010.
Source: CBO Combined OASDI Trust Funds; January 2011 Baseline 26 Jan 2011.
Note: See Primary Surplus line (which is negative, indicating a deficit)
A radio talk show on KOA I think said it. JFK was the first to break the piggy bank and remove monies and leave an IOU. When all the IOUs are added up it comes to $13.4T.
This is another quick source to the IOUs but not the total. Newt Gingrich said a couple times on radio that he hated it each year when CONgress spent the “surplus”.