| It does have an impact on intergovernmental debt. Here's a good explanation from GAO[1]: > Intragovernmental debt holdings represent federal debt owed by Treasury to federal government accounts—primarily federal trust funds such as those established for Social Security and Medicare—that typically have an obligation to invest their excess annual receipts (including interest earnings) over disbursements in federal securities. > Debt held by the public represents a claim on today’s taxpayers and absorbs resources from today’s economy, meaning that when an investor buys Treasury securities it is not investing that money elsewhere in the economy. > Intragovernmental debt holdings reflect a claim on taxpayers and the economy in the future. Specifically, when federal government accounts redeem Treasury securities to obtain cash to fund expenditures, Treasury usually borrows from the public to finance these redemptions. From memory I believe we're at ~100% publicly held debt to GDP and ~122% gross debt to GDP. [1] https://www.gao.gov/assets/gao-25-107138.pdf |
The Social Security surplus is pretty much required to purchase US bonds and other guaranteed Federal securities.
But saying that "contributes to the Federal debt" is like saying your 401k contributes to corporate debt.
I am still not convinced that Social Security causes Federal debt the way that a trillion-dollar military budget does.