From the minutes of a meeting of the Social Security Advisory Board (SSAB):
The board met with representatives of SSA [Social Security Administration] and the General Services Administration (GSA) [which handles a number of federal government tasks such as leasing office space] to learn how and why SSA makes changes to its field office spaces, what so-called “trust fund” buildings are and why GSA is paid for those by SSA.You got me. What's a "trust fund" building? No, the Social Security trust funds are not invested even a little bit in real estate. They're required by law to be 100% invested in U.S. government bonds. The Social Security Administration owns some office buildings but they're just what's needed for the agency's office space. I suppose there may be some extra office space that the agency leases out or which it no longer needs and is in the process of selling but that's not investments. Why would SSA be paying GSA rent on office space that SSA owns?