In an accounting sense, but it will start drawing from income sources other than payroll taxes as soon as outlays exceed those incomes, which will happen a lot sooner. The trust fund is an accounting fiction, and a debt to yourself is not an asset.

"Solvent until..." is a contradiction. If you're solvent until you have to pay your bills, you're broke.

The "solvent..." part of that assertion isn't severable from the "... without changes to..." part.