I absolutely consider that their belief is along the lines of "if we pass it (IRA confiscation or, indeed, any other part of their Fascist/Marxist agenda), it won't ever be repealed whether we're still here in the Regress or not".
They don't have any constitutional authority to grab accounts or dictate allocations. If they really need the money, they would just stop the program or reduce the amount you can put away. The other thing they could do is just raise SS taxes. That is way you rip people off.