They arent really loopholes though are they, Musk for instance is taking a risk to avoid taxes, and someone else with a low time preference is benefiting by accruing interest by lending him money.

They still pay taxes in the end, and it will be far higher than it would be if we plucked the fruit of their labor now. Except the IRA thing but that cant be terribly common, and again Thiel took a massive risk by not diversifying. But sure go ahead and write a law to take a chunk of that unicorn whenever it is he decided to realize it, it will fund a few hours of government spending.