Legalize drugs and prostitution.   Use 100% of the taxes raised for prevention and rehabilitation.
Repeal the Second Amendment.   Outlaw guns except for a couple of rifles and couple of shotguns for the hunters. Put GPS in them so they won't shoot in the city. You can shoot anything you want at the shooting range, but the guns stay there.
Citizen review board of police with the power to fire them.   Held at the precinct level. If you're a close relative of someone killed by police you are automatically eligible to be on a board for life.
Second economic system for the lower class.   20 hour workweek. 60 to 120k annual income based on work and carbon consumption metrics. Annual COLA's.