The US gov should immediately withhold all tax donations, i.e. no more hand outs, to NYC.
A high wall, at least 12 feet tall, should be erected around NYC. US citizens with proof of citizenship should be allowed to pass in either direction. No one without absolute proof of citizenship should be let out. If there is a question, then a small civics exam should be given in English. That would be the beginning of a vetting process to allow passage
and so on....I have always known NYCers have an external locus of control. It is time they assume some responsibility of their own.
Better idea.
Cut it off at the city limits, push it out to sea, and pull the plug.