Pretty much every economist who has ever thought seriously about UBI has already given an answer. Most of the funding would come from abolishing progressive inc

Pretty much every economist who has ever thought seriously about UBI has already given an answer. Most of the funding would come from abolishing progressive income taxes. Instead, the highest (or second highest) bracket would start at 0. With the current federal tax rates and incomes, that would raise an additional ~$3 trillion/year.