I don’t think anyone misunderstands that. I don’t believe there is anyone in this thread that has said that SS does not have a funding problem; merely that it’s not the biggest problem the government faces.
Not quite, because, as has been pointed out (accurately) in this thread, SS has a dedicated funding source. Even after the trust fund is exhausted, SS will collect enough money to pay out ~75% of scheduled benefits, in perpetuity (at least to the end of the 75 year actuarial window). The remaining 25% represents roughly (going from memory here) 1.5% of expected GDP. We currently have a budget deficit of roughly 10% of GDP; SS projected impact on the deficit in 2030 (which may well be wrong) is small potatoes. That is one of the points most people are making.
The other point people are making is that drawing down the trust fund is a perfectly reasonable approach for SS to take, as that is why the trust fund was established. I don’t know if you’ve made this particular point, but plenty of people in this thread have tried to argue that the trust fund is merely an accounting fiction, and hence we should worry about SS’s effect on our finances right now. I, personally, think that argument is a bit of flim flam mostly intended to screw over the middle class to the benefit of the wealthy.
Social Security affects the total federal deficit (for the past 30 years, mostly by reducing it), but not the on-budget deficit. A plan to build an American space station on Mars would affect the latter.
As to why this particular accounting practice matters, it’s because the implicit deal cut by the Greenspan commission in the 80s was for SS to finance the on-budget deficit for 30 years, in return for having its deficit financed by the general fund for the next 20. In particular, this means that any tax increases intended to cover SS’s withdrawals from its “imaginary” trust fund should come from income taxes, not payroll taxes. The SSTF represents more than a loan from Social Security to the federal government. It represents a loan from the working- and middle-classes to the upper classes. And that loan is coming due.
For what it’s worth, the SSTF is not currently being drawn down; SS receipts don’t cover SS outlays (though most of this discrepancy is due to the 2% payroll tax cut passed for this year), but SS receipts + interest do. The trust fund is still growing.