"Proposal could net up to $250bn a year in extra revenue, says report commissioned by Brazil for G20"
"...billionaires were currently paying an average of 0.3% tax on their wealth"
[The plan would be] "a top-up to income tax so that billionaires paid an annual tax bill worth at least 2% of their wealth"
https://www.theguardian.com/news/article/2024/jun/25/international-scheme-to-tax-billionaires-wealth-technically-feasible-study-finds
🔸$250bn is about a third of Japan's 2024 budget (¥112.57T = $744 bn)
https://www.japantimes.co.jp/business/2024/03/06/economy/government-budget-fiscal-challenges/