>"Nobody has made them yet, so there is no data."
What exactly is "fair" as far as taking someone's money and non-liquid assets? Is it fair that half of Americans pay no net taxes at all and everyone else has to cover that? (Net taxes are all monies the individual paid vs. all value of monies and services given back to that individual).
It isn't even real money, it is almost all valuation of non-liquid assets. You could liquidate it all, then take it all of what was left (it will be a lot less) and distribute it all out, and in a short time, everything would be about the same as it was. And then we would be worse off, because it is likely all the companies associated with him would fail, thousands would lose their jobs, tons of lost revenue and tax for many years, and lost products that make people's lives better.
If you could liquidate it all, maybe at half-value (which is extremely optimistic), that is $500,000,000,000. Give it equally to every person in the USA, it would be about $1429 each. Inflation would temporarily increase due to that and gobble up much of its value. And then no money or value or tax would ever replenish it because the engine creating that money is gone.
His having tons of "money" doesn't "take" it from other people. He created the wealth and expanded the pie. People happily and voluntarily transacted with his companies, getting what they wanted, and the free market valuates the companies based on past performance and expected future performance.
Aside from what you might think of Elon (and there is justifiably a lot of variation in that), he has produced a zillion times more services, jobs, goods, tax revenue, and helped a zillion times more people than anyone on Slashdot ever did, could, would, or will. If you are worried about his control or power, that is a totally different topic, and a function of preventing government fraud, enforcing anti-trust and such.