As others pointed out, that just can’t possibly be correct given the median pre-tax number and actual US tax rates. If you made the median individual income of $45k and lived in a high tax state like California, your net would be ~$37k.

Which is also super wrong because median income for full time employees is $54,000

Many people are not employed though (or are children). I wonder if this figure is for every single person. Or it could just be wrong.