For their next trick, I would encourage them to abolish and reform the NYPD. Although I fear if someone seriously tried, there would be a coup.
If you did something like this, the result would likely be having the National Guard come in and restore order and be far more oppressive than the NYPD is.
Some of the US police problems might be solvable by a floating Federal civilian force which could come in from outside to replace and investigate the most corrupt local forces.
I'm not an American, but it seems to me an issue with a federal police force is that federal laws may differ from state laws (e.g. with regards to prohibited substances, among other issues).
I say this as a proud New Yorker well versed in local history.