Beyond its high cost, Social Security suffers
from a serious technical problem: There is no way to reliably pay
for the program as it currently exists. As the number of
contributors paying into the system falls, the number of
non-working recipients increases. Veronique de Rugy warns that the
longer Congress delays dealing with this and other issues, the
worse the shock will be when the money runs out.
from Hit & Run http://reason.com/blog/2013/12/20/veronique-de-rugy-on-slouching-toward-ba