PARIS — Popular French economist Gabriel Zucman says French Prime Minister Sébastien Lecornu made a fatal mistake by not embracing his eponymous "Zucman tax." Zucman told POLITICO in an interview that both Lecornu, whose government resigned Monday morning , and his two immediate predecessors had not taken the proposal seriously. "The executive has so far remained completely deaf to both parliamentary work and popular democratic demands," he said. "They didn't try to have a real dialogue with