I am not a tax expert, but my understanding is that it isn't as simple as you imply. Assuming it's income tax being avoided, for example, due to high income th

I am not a tax expert, but my understanding is that it isn't as simple as you imply. Assuming it's income tax being avoided, for example, due to high income the Pease rule may mean that someone in this situation is actually only seeing a deduction of around 8% (80% reduction of the deduction times current top rate). That doesn't seem like much of a subsidy for billionaires to do tax planning around. For people with lower (but still high enough to be taxed at the top rate) incomes the number is more like 40% which makes sense, but I would guess that most or all billionaires are in the 8% situation - unless I misunderstand the tax law or they have some strange income structure I'm not aware of. The Pease rule was suspended for a few years during George W Bush's presidency, but is currently the law again.