And you have a point: how the heck will elected officials ever pry SS away? It goes straight to the people wielding the most political power.
Big Money, I forgot how old you are. IMO, anyone over 55 will with a high probability get SS about as it now stands. The government may be able to distract younger people, pull a bait and switch, whatever is needed to lessen the obligation. One very effective technique is all this talk about bankruptcy. My kids have completely discounted SS for them. What one has given up on, he will have a hard time fighting for.
No matter what age one is, I fully expect the government to whittle away at SS payments indirectly. For example, there are a lot of trial balloons out there about changing the way the COLA factor is figured. Greeny alleges to believe that the CPI-Urban understates inflation. What a fantastic joke! Another easy one is to create negative feeling about rich retirees, and thus tax benefits more heavily.
Our current culture of political correctness and nonjudgmentalism aids and abets this. My Dad, who if he were still alive would be 93, would read some official pronouncement from the newspaper. Then he would say loudly, "Horsesh*t! IMO, this is a more survival oriented attitude than, "Oh, the government must be tryig to help. I had better reserve judgment."
Look for divide and conquer, misdirection, and bait and switch. Then really keep your eye on how they are stealing your money.