I keep telling my friends on the right: you really want to raise the cap on SS contributions.
You are talking about the moving to a system where the dominant source of revenue for the Federal Government is a flat, deductions and exemptions free tax on labor.
No other course of action makes holding down capital gains taxes more likely. No other course of action a millionaires tax bracket less likely. No other course of action has less tax avoidance and evasion associated with it.
Medicare will not be killed. This is your shot. Take it.