The tl;dr is:

1. That dementia riddled shithead Reagan changed the law to allow companies to buy back stock. This is classic stock manipulation and was illegal before that piece of shit was elected by the same degenerate demographics that are fucking up shit today.
2. Billionaires will “borrow” say, $100 million dollars, using their stock as collateral. Now they only have to pay the interest, low single digits, instead of actual income tax.

And a key quote from the article:

As a result, loopholes abound that allow the wealthy to shelter their money from taxation. These mechanisms are so effective that even though the wealthiest 1% of Americans own $50 trillion, the entire amount collected by the estate tax in 2024 was about $30 billion, an amount that Musk has gained and lost in a day.