Even the most aggressive wealth tax that is proposed is for a tax on wealth of over $50 million. So the founder of businesses valued up to around $100 million dollars would reasonably be able to maintain control without paying any wealth tax.
So I'm perfectly OK saying you can't single-handedly control a business larger than $100 million without paying the rest of society extra compensation for maintaining that kind of power.
Seems perfectly fair to me. Power is finite in the same way land is. If controlling a company is valuable to you in some other way other than just amassing power, say you are really behind the mission of going to space, you can reorganize into a non profit.
In reality, there are loads of people in between: founders of medium size businesses.
The wealth tax is imposed on everyone in this spectrum. The capital gains tax is only imposed on those that amass the most amount of power.