Social Security has started dipping into its trust fund to cover its obligations. *Furthermore, the percentage of the budget Social Security and Medicare take up is increasing every year.
So yes, they do contribute to the debt.
http://www.nytimes.com/2013/01/06/opinion/sunday/social-security-its-worse-than-you-think.html?_r=0
Federal Spending by the Numbers - 2012
I was trying to give you the benefit of the doubt, that maybe your confusing Supplimental Security Income (SSI) with Social Security Retirement Benefits (OASDI). *But you say clearly, "Social Security has started dipping into its trust fund".
As OASDI, Social Security Benefits is a completely self funded non discressionary program, it can't add to the debt and deficit.
Wrong. The Social Security surplus has been used to reduce the budget deficit calculation for many years. In the near future, it will start adding to the deficit.