If you exclude payroll taxes AND ALL OTHER TAXES. Then sure you can play with the numbers.
Reality is they are not paying 50% of income tax as social security is a federal tax on income. There are also plenty of regressive taxes. Pay for lunch that's taxed, pay for an accountant free. Guess who spends more on accountants?
Just because you call a tax an insurance fund or a pogostick, does not mean it's somehow not a tax. Government collects money from X, and hands it out to Y that's a tax.
Reality is they are not paying 50% of income tax as social security is a federal tax on income. There are also plenty of regressive taxes. Pay for lunch that's taxed, pay for an accountant free. Guess who spends more on accountants?