I am not a tax expert, but my understanding is that it isn&#x27;t as simple as you imply.  Assuming it&#x27;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&#x27;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&#x27;m not aware of.  The Pease rule was suspended for a few years during George W Bush&#x27;s presidency, but is currently the law again.