Social security has paid out what is due for over 75 years and has a $2.1 Trillion surplus, and would not run out for 25 years at the current rate. Sanders is first standing up against those who would seek to make cuts or increase the retirement age, and is instead proposing that we should drop the cap on the tax. Currently, only the first $106,500 of income is taxes, meaning the the super rich pay a very small percentage of their income to social security compared with the middle class. Sanders is proposing a bill that would tax all income the same, a flat tax if you will.
For those proponents of a flat tax, why not start with social security?