Not saying you are wrong or anything. I just remembered seeing Bill Gates’ name being brought up as a supporter of raising the estate tax for the richest rich people. Its not the article I remembered but didn’t feel like spending time sorting thru the search results for the most reliable source but here is a Forbes article that mentions Gates as supporting raising the estate tax:

forbes.com/…/billionaires-more-taxes-gates-buffet…

There is prolly more/better articles out there but all the top search results today are referencing Trump’s estate tax hike that was announced in the past day or so.