Debt is debt.
This fictional accounting is a silly marketting gimmick, not a meaningful distinction. It's a government program just like all other forms of welfare.
Do you think that there were decades when lots of folks were contributing and no one was collecting?
It's like saying that it's meaningless for you to loan yourself money, because it is (except when there is some other, external reason that it carries meaning, not by rules you made yourself.) We constantly ignore these internal self-debts for people and for companies.
https://www.cbpp.org/research/recommendation-that-presidents... notes
> Most economists agree that the debt held by the public is what really affects the economy. As the Congressional Budget Office stated in its June 2009 report on the long-term budget outlook, “Long-term projections of federal debt held by the public, measured relative to the size of the economy, provide useful yardsticks for assessing the sustainability of fiscal policies.” In contrast, “gross debt . . . is not useful for assessing how the Treasury’s operations affect the economy.”
If it is funded by taxes, it is funded by government.
You could argue that the social security trust funds are loaning money to the general fund, but that’s like saying your savings account and money market account are loaning money to your checking account.