Social Security is financed by a payroll tax that is a flat percentage of earnings up to a maximum wage base. Evaluate this method of financing versus one where there is no maximum wage base....

Social Security is financed by a payroll tax that is a flat percentage of earnings up to a maximum wage base. Evaluate this method of financing versus one where there is no maximum wage base. Similarly, what would be the redistributive effects of applying this flat tax to income from all sources or from just earned income?