Other follow up, you can always buy government treasuries for yield to offset the tax, which requires very minimal work. At billionaire wealth level, you most certainly have someone managing the funds for you.
They yield 3-5% right now. Official inflation is 8%. You're losing 3-6% based on official inflation data. I don't know about you though, but things went up a lot more than 8% for me. But let's say just 3% a year loss, that's a loss of almost 30% over 10 years.
You’re not entitled to be sheltered from inflation, especially not for just passively investing income.