You did not pay taxes on the money you are collecting from Social Security. In fact, you didn’t even pay taxes to fund most of your Social Security benefit.
If you contributed to a pension on an after-tax basis and your employer also contributed, when you collect your pension, you do not pay income taxes on the portion of your pension to which you contributed.
Social Security works the same way. Only a portion of Social Security benefits are taxable.
The alternative would be no SS benefits taxable until all workers payroll taxes are received (after 3-5 years) as benefits and thereafter 100% of the Social Security benefits becomes taxable income.
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