Putting aside how Musk, Gates, or Bezos lean politically... It's simply unfair to say they have not paid any taxes. People can debate whether they or anyone else have paid their so called 'fair share' of taxes, but they have in fact paid billions in taxes directly, but more importantly, their companies and their companies' suppliers/vendors/resellers/partners, have created jobs, products, services, and capital gains that likely resulted in trillions in tax revenue globally. As for Gates, he has already donated over $50 billion to charity and intends to donate 'virtually all' of his remaining net worth over time. Bezos's ex has donated $14 billion, while he has donated $2.4, but committed to $10 billion so far. Musk has donated at least $5.7 billion. Anyone want to claim that the US government or any government should get the money they donated to charity instead? Many billionaires simply believe they are better at making use of their fortunate for good than their government.
I would also like to add Warren Buffett to the list as he's truly a great philanthropist billionaire. He founded The Giving Pledge in 2010 with Bill Gates, whereby billionaires pledge to give away at least half of their fortunes. He has pledged to give away 99% and lives very modestly.
We should celebrate success instead of demonizing it.