No, SS is the most progressive of taxes we have in USA. The benefits do increase as your salary and contributions increase, but not in a linear fashion and there is a cap on payouts. For instance if you are in the highest salary bracket i.e. paying the maximum SS tax before you retire you do not get twice as much in benefits as someone making half the salary as you.
While SSI benefits are abused by many, eliminating the abuses will not change the SS balance sheet enough to make it solvent.