There's a reason why the statistic uses the wording it does. Tax shelters are thing. Here's a recent example: https://www.propublica.org/article/irs-files-taxes-wash-sales-goldman-sachsI just heard that 8.2% recently on CNBC and it is not just based on income, it is based on unrealized gains also (gains that can disappear as easily as they appeared). It gives a very distorted view...as expected by our esteemed elected officials. If we start basing income taxes on unrealized gains, it can only lead to a gigantic mess.
ETA: if I remember correctly, the billionaire tax rate was well over a 20% tax rate when only including actual income only.