I’ve got a better idea; let’s just confiscate all of the assets of all billionaires who advocate for higher taxes of any kind or the reinstatement of repealed taxes (including estate taxes).
Let’s start with Bill Gates.
Fairer option, that would hit just as hard: Repeal section 501(c). Eliminate the concept of tax-free "non-profits". Have the "Bill and Melinda Gates Foundation", the "Ford Foundation", (and all the rest of the non-profits that the super-rich use to shield their money) pay taxes on the income from their investments. Have Harvard and the rest pay taxes on their endowments income.