And I say this as someone who unabashedly supports allowing it to revert to its statutory payout rat, even if it is below what was promised.
But seriously, nobody was promised anything not dictated by statute. Who gives a shit about what you, specifically understood the statute to mean? By any reasonable understanding of the law it's not even possible for SSI to go without funding, assuming the government is still operational.
What's more real and relevant is that the government only cares about your insofar as you contribute to the private economy. Like what can we do to make those fucks actually pay out and take care of us?