For those who are not familiar with USA revolutionary history, the Boston Tea Party was a riot against an increase in tax on imported tea imposed by the king of England without any consultation with the British North American colonies. The actual complete phrase was "No taxation without representation." The irony is, many Trump supporters are not saying anything about Trump's unilateral decision to impose tariffs, bypassing the representation Congress is supposed to provide.
Alt text: A two panel comic. Top panel has a title of 1776, and a white man is yelling angrily. The word bubble says "Pay a 3% tax on tea and paper. Screw that! Revolution!" The bottom panel has the title Now and a white man looking despondent. The word bubble says "Pay 40% of your income. Sure that's totally fine."
I'm not that familiar with tax law in the USA, why is it impossible? Is it because making money by having money is not taxed, so if it makes up a large enough percentage of your income, the percentage of your total income you pai in taxes can never reach 40%? If so, at which point does it become impossible? (Unless there is a 100% tax bracket, which would be Un-American™)
Capital gains and qualified dividends cap at 20% federally and 12.3% in the state with the highest tax rate, so the tax burden on them can never exceed 32.3% at infinite earnings.
Regular income caps at 37% federally and 12.3% in California, so can get up to 49.3% at infinite earnings.