This “conversation” is frustrating because I’m not sure we disagree on any important issue here; it’s more of a different perspective. I’ll go one more round of rejoinder because flawed perspective will lead to flawed thinking.
Little Nemo, you didn’t really answer the Question. It wasn’t intended to be difficult or tricky.
I specifically stated that U.S. insolvency was a big and important problem. Did I need to use a bigger font for that? :smack: But that insolvency is unrelated to the bizarre misconception you have about the Soc Sec surplus.
Look: Suppose a unit of Citibank maintains an investment fund in banking shares. Suppose that the fund is $10 million and split equally among ten banks; suppose one of those ten banks is Citibank itself. Does that mean the fund has only $9 million of “real” investment, and the $1 million in Citibank is fake? I know from some of your other posts that you’re not a typical right-wing idiot, but some of them claim that the U.S. debt paper held by the SocSec Trust Fund is “unreal” in a way that, say, Zimbabwe bonds would not be.
Now, one can wonder if and when Moody’s is going to downgrade U.S. Treasury debt, but do so please in another thread. The paper held by Soc Sec is no more “fake” than the shares of Citibank, in the hypothetical example above, held by its investment unit.
This is the kind of gibberish that makes you sound like a right-wing idiot (even if one of those labels doesn’t apply). Bonds of other countries (even Zimbabwe) would be “real investments” that could be “resold in the future”; why don’t U.S. bonds qualify?
I agree we should stop pretending that falsities about Soc Sec are true, and am trying to explain the falsity in your thinking. 
Do you understand this much: For every $1 million that Soc Sec invests in Zimbabwe bonds instead of U.S. bonds, the U.S. Treasury would borrow $1 million from someone else? (For definiteness let’s stipulate that it borrows the $1 million from Zimbabwe!) When someone redeems that $1 million bond, the U.S. Treasury will have to come up with cash, but it will have to come up with that cash whether it’s Soc Sec or Zimbabwe that’s redeeming the bond! (You seem peculiarly focused on where that $1 million will come from. It can come from taxes, new debt, or some form of fiat money.)
If Zimbabwe seems too sardonic, substitute the Kingdom of Denmark. If Soc Sec bought Denmark bonds, and Denmark turned around and used that money to buy U.S. bonds, would it have much effect on U.S. solvency? No. Do you understand why the fixation on the way SocSec invests its surplus doesn’t enlighten, but confuses?