For US citizens there is another petition which you can sign : https://www.oxfamamerica.org/take-action/action-alert-tax-the-rich/

American billionaires are 33% richer than they were at the start of the pandemic, all while inequality has worsened and inflation has soared. Billionaires like Elon Musk and Jeff Bezos pay a “true tax rate" of just 3% or less while working people around the globe pay far more.

Enough is enough. It’s time for the ultra-rich to pay their fair share of taxes.

Just a modest tax of up to 5 percent on the world’s richest individuals could bring in $1.7 trillion in a year, enough to lift 2 billion people out of poverty.

Sign your name and demand that President Biden, Congress, and world leaders address the inequality crisis globally and here at home by making multi-millionaires and billionaires pay their fair share of taxes.