THe only reason SS would not be intact in 25 years is if it is privatized. And your best case scenario is worse than the worst case scenario.
There is no logic to that. Privatization is actually the only thing that will save SS. Proponents of SS often argue that hey, we're good through 2037 (now 2036) - I believe you have made that argument on here before. Even among proponents, it's basically accepted that it is unsustainable in its current form. And, as I said, at minimum, we'd be talking about a 25% cut in benefits in 10-20 years.
It's ludicrous to me. I haven't heard one good argument explaining a downside to privatization; not one.