Thanks, I had overlooked that recent tax increase by Hollande
But I do not think at all that that tax killed the French economy.
Even if such a tax would lower structurally the GDP per Capita with 1-2%, which I do not believe, I would be quite happy to have a 1-2% lower prosperity level for myself if that is the consequence of a more fair society.
On that 80%.
I digged in a little bit and saw in an Guardian article of 2014, when Hollande was "forced" to drop that tax, that it was 75% on earnings
above Euro 1 million (not their total earnings).
https://www.theguardian.com/world/2014/dec/31/france-drops-75percent-supertax
To consider:
In the period 1940-1970 very high progressive tax systems were common in the western developed world, Typical 70-95% for earnings above the highest treshold of the system.
And yet.... surprise, surprise... the period after WW2 enabled these countries huge economic growth in GDP and GDP per Capita, and enabled West European countries to invest massively in their infra and at the same time to build up a solid welfare system.