"Because the surplus payroll taxes were handed over to the federal government (in return for Treasury bonds), this meant ordinary income taxes could be kept low. After all, the federal government has a fixed need for money, and if it gets excess money from payroll taxes it can afford to keep income taxes lower than they'd otherwise be.
But the payroll tax is a flat tax, paid disproportionately by low and middle income workers. The income tax is a progressive tax and is paid disproportionately by high earners."
And the proposed fix? Make the poor poorer so that the wealthy don't have to be prevented from getting wealthier. How about a system where everyone's income goes up? Like it did under Roosevelt and Clinton?