You're missing the point. The effective tax rate of many billionaires is lower than ours. "Musk with a fortune of $244 billion, paid an average effective tax rate of 24% from 2018 to 2020". In other years it was as low as 3%[2].

[1] https://www.cbsnews.com/news/income-taxes-billionaire-tax-ra...

[2] https://www.propublica.org/article/the-secret-irs-files-trov...