That's how post-WW2 France was actually rebuilt. You could also see big hints of that in the US WW2 economic effort, which couldn't have been done without the Government taking a direct hold of things and instituting central-ish planning.
You're speaking of what is referred to as neo-corporatism [0] and it's a tripartite, democratic process, not the fascist sort where everything is within and for the benefit of the state [1].
There was not that much democracy in the French post-WW2 technocratic establishment, but I agree that they were not technically fascist (nor otherwise).
