[ajju]

If, at the moment of formation, the company has a binding agreement with Elon Musk (the founder) requiring their services for a fixed time allocation and at a fixed rate of remuneratin, then yes that contract has value and therefore the company has value. The value will depend on the remuneration to Mr. Musk vs the perceived value of his services. Even so, it would be as one of a small % of outliers with high-value founders amongst the millions of companies incorporated every year. Was Peter Thiel as valued when he started paypal as he is now? No.

More importantly, acknowleding that very few companies may have value at inception due to the value (and commitment) of their founders' time doesn't make it any easier to systematically value that time. To legally enforce this, you would have to have valuation and audit service providers who do this - creating a bureaucratic hurde that every founder - famous or not has to go through - just to start a company.

It is my opinion that the cost of doing this - in reducing or slowing down the number of companies started and the lost taxes as a result - would significanty outweigh any gain in taxes from taxing the notional value of Elon Musks's presence as part of his own company.

All laws that apply to humans, particular compliance related laws, have significant second order effects. The second order effect of taxing the popularity of folks when they start a company is that thousands of less rich, less popular, less privileged, and less confident first time founders will face an additional hurdle when starting a business and they may never start one, never get rich through one. Ultimately, inequality would likely increase and rich established founders like Elon Musk and Peter Thiel would likely be more entrenched and benefit more from this, not less.