"The biggest reason for Zoom's de minimis tax bill is outsized executive compensation. Zoom paid $580 million in stock compensation alone in 2020, much of it likely to a handful of top executives, according to a calculation by CBS MoneyWatch based on the company's latest financial filings."
At some point, somebody will have to pay taxes on selling that stock. Or if they never sell it, at least they will prop up the stock market, so the Fed has to do less of that with everyone else's money.