The people in the city may think they are self-sufficient from the rest of the state, but they are not. Where do you think the water supply for NYC comes from? There's a lot of stuff outside the city that supports the city economy.
Straw man. States trade water all the time out west: the city would purchase it just as they would any other resource. Commerce between states is incredibly common already, and all of the states are economically intertwined as it is. Michigan gets its oranges from florida: why can New York get its food and water from New York State? It's not like the state being governed on its own creates a magic wall between the two.
Not to mention that commuters would then have to deal with living in one state and working in another, which is a PITA come tax time. There is a lot of exchange going on between the city and the rest of the state that people don't think about.
There is more trade and commerce between New York City and the state of New Jersey than there is between New York City and the upstate regions. More people commute from Jersey and Connecticut into the metro area than commute to the metro area from within the state but outside of said area.
Were New York City its own state, comprised of its current contiguous urban zone, fewer people would be commuting over state lines than are now. There would be less travel between states overall.
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Were New York City its own state, comprised of its current contiguous urban zone, fewer people would be commuting over state lines than are now. There would be less travel between states overall.
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