They don't stand for anything, so that's an easy target to hit.
The truth is there are 3 options: 1. Increase taxes, 2. Decrease benefits, 3. Change the equation.
The first won't work because of the simultaneously increasing recipient population and decreasing paying population. You'd have to take most everything the payees were making just to pay for the benefits.
The second won't work because with the simultaneously increasing recipient population and decreasing paying population, you'll have to lower the benefits to where they'll cover so little that you might as well not have the benefit.
The 3rd option has the potential to have workers build funds UNTOUCHABLE by the Federal Government...funds that belong to the individual and only to the individual. That plus some centralized social security money just might total enough to make a difference to retirees fifty years from now.
There is a fourth option and it is similar to what Europe and Canada are doing. Dramatically increase the rate of immigration of young workers. This ensures a steady supply of FICA taxed workers that will cover current costs. The downside is the destruction of American borders, language and culture. In some ways, it would be poetic justice. Reduce the benefit levels of retirees to match the wage levels of a flood of immigrants so those people relying on cheap labor get cheap benefits.