This is scaremongering Brendan. The SIF has been in deficit on and off a few times and the Exchequer had funded it. The SIF is not run on actuarial principles like in other countries. Very few people even know what it is.
When I draw the state pension (decades from now!) I fully expect it to be lower in real terms, harder to qualify for, and paid out from an age closer to 70. But I am very certain that a full working life will get a contributory state pension that is not means tested.
I fully expect this rate to change in coming years, as it should. The self-employed get far too generous a deal with PRSI.