They won't do that though, because they know that there will then be clamor for
repeal of jaywalking laws.
I'm at 32nd and 2nd as I type this, and let me tell you: pedestrian pride is SERIOUS in NYC. We don't give a fuck about jaywalking laws, and if they start making this city impossible to walk in, city hall will hear about it.
Currently, jaywalking laws are (disgustingly) used to target people that police want to target and for no other reason. If you put it to a vote, I think that the vast majority of NYCers will prefer an "implied crosswalk" law, where pedestrians have the right-of-way in all situations except when they jump in front of moving traffic.