Only because that much of the population is so destitute that they literally can't afford to be taxed - their income tax is pretty much just an interest-free savings plan where they get the money back every April/May. The Top 1% only seem to pay that much because the Top 0.1% have bled the rest of America so much that the tax burden has shifted that much.
In all reality, the majority of the tax burden should be sitting on the middle class, but the middle class is disappearing faster than an endangered species that's being exploited by poachers.
In all reality, the majority of the tax burden should be sitting on the middle class, but the middle class is disappearing faster than an endangered species that's being exploited by poachers.