These billionaires haven’t engaged in any illegal activities to avoid tax, but the data does highlight possible flaws in the American taxation system which allow the mega-rich to pay so little.

President Biden is looking to tackle this by increasing the top marginal income tax rate from 37% to 39.6% and raising tax on investment gains from 20% to 39.6% for those earning more than $1 million (£614k). The tax increases on the rich would help to pay for Biden's $2 trillion (£1.4tn) infrastructure plan and $1.8 trillion (£1.3tn) American Families Plan, as Biden believes improvements should be financed by "the wealthiest Americans who can afford it and corporations and businesses who can afford it," according to White House Press Secretary Jen Psaki. However, critics say the super-rich will continue to use measures to bring their tax bills down.

Over the years many of America's super-rich have asked to pay more in taxes than they currently have to. Let's take a look at some of the most notable advocates of higher taxation for the ultra-wealthy.

The super-rich who allegedly pay low taxes, and those who want to pay more