From Mead's New York’s Blue Suicide:
New York City has been governed by liberals for generations. Surely if blue policies could produce an egalitarian utopia with a strong middle class, we would see it in New York before we would see it anywhere else. If liberals were good at running cities, people from all over the world would be coming to study New York’s public schools, marveling at the extraordinary success with which unionized teachers were transforming the lives of low income kids. Our transit system would be the envy of the world as well; awestruck visitors from benighted places like Shanghai and Tokyo would come to gaze in amazement at the speed, cleanliness and economy of the New York subways. Small business formation would be booming as the bustling economy of manufacturing start ups created opportunities in the inner cities.
Yet, somehow, this isn’t happening. It’s great mystery.
NYC thrives and is vibrant despite its government, not because it it. It's just lucky enough to be a people-magnet. A magnet for talented and/or ambitious young people from all over the world.