The Social Security payroll tax hurts working Americans -- and it’s getting worse. Because the tax (a flat levy of 15.3 percent, combining the nominal employer portion with the nominal employee portion) applies to income only up to $97,500 (with a scheduled increase to $102,000 this year), it is inherently, grossly regressive, falling far more heavily on working Americans than on the rich. At the same time, as a result of rising pre-tax wage inequality, the payroll tax system is growing dramatically more regressive.