You are asking what a reasonable objection is to you demanding someone else pay more money?
"Gimme gimme gimme, and make that guy over there pay for it."
You have a false dichotomy. You present the situation as either Social Security going insolvent or taxing the rich more.
There is at least one other alternative: Raise the eligibility age. We are living decades longer than our ancestors, we should be working longer. Can you afford to work 7 percent longer than your great-grandfather did? You are going to live 30 percent longer than he did.
I guess the word "fair" is nowhere in the picture for you when you are presented with these realities, eh?
See, for people like you the answer is always, "Tax the rich more." Need more roads and bridges? Tax the rich a little bit more. Need more goodies from the government? Tax the rich a little bit more. Need more Social Security cash so you can retire at the same age your great-grandfather did? Tax the rich a little bit more.
And so on. It adds up.