Widespread job creation means more FICA contributions (think 15 million jobs we're currently down). Remember that every job created that pays under 106k a year means lots more FICA being paid. Real wage increases will also mean more FICA contributions. Like this, Median Individual income is about 26k, if wages grow back to their peak during the Clinton years (nearly 39k) that represents about a 30% increase in FICA paid into the SS trust fund for an individual worker.
One of the SS trustees scenarios say SS will go broke in 2037. Widespread job creation can push back that date to 2050 or even 2055.
Real wage growth on top of lots of jobs can push that date back to 2060+.
The SS trustees report includes 3 scenarios, the low cost scenario says that SS is good thru 2085. It is an extremely unlikely scenario, and GDP growth thru job creation and wage growth cannot get us to 2085 alone, population living longer and productivity also play into getting us to 2085. Good healthcare that makes people live longer actually depletes the trust fund sooner.
A good economy may not get us to the 2085 date, but it will vastly improve Social Securities health, without making any changes to Social Security. Its like a 2 for one special at a store, its a great deal, fixing the economy and fixing Social Security, by creating jobs.
Looking 75 yrs into the future the Social Security gap is a measly 0.6% of GDP. raising the cap can cover most of it, depending on the way its done. But with most economic activity currently benefiting the top .1% of earners and medium and large corporations (see increasing wage disparity) reversing wage disparity can be a large factor in gauging the future health of our working and middles classes as well as Social Security.
Heres Bruce Webbs great blog on the SS CBO scoring
http://www.angrybearblog.com/2010/07/cbo-scores-social-security-policy.htmlI'm having trouble loading this page, hopefully you can load it, its really great at explaining the shortfall and the effectiveness of different solutions.
http://2.bp.blogspot.com/_fjW71B3WLTQ/TC3Bs2undtI/AAAAAAAAAYI/PQiTSfBitWo/s1600/CBO-SS+options+Fig+1.jpg