France keeps coming back to the wealth tax, budget after budget, and I follow it closely from here.
The Zucman tax would take 2% a year of net worth above €100 million, including shares in your own company. The Assembly voted it down on October 16. On November 7 LFI put it at the top of their presidential program anyway and promised €15 billion a year from it. The Conseil d'analyse économique and Philippe Aghion put it at no more than €5 billion once people optimize or leave, and the Conseil d'État has flagged it as possibly unconstitutional.
Think about what it means for a founder. Elon Musk's wealth is Tesla and SpaceX stock. A 2% yearly tax on that gets paid by selling shares, and after 20 years of it you've handed over about a third of what you built, in good years and bad ones.
France already tried this. The ISF was scrapped in 2018. Imagine that energy going into building the French SpaceX.