There is no quick fix. None. A permanent curfew will become meaningless very shortly in Trinidad. Everybody will have a pass. Fete might be curtailed now but after a few weeks or months it will be the same old khaki pants. Its still Trinidad afterall. There will not be enough police manpower to effectively manage a permanent curfew, not to mention the unsustainable added cost and Police already grumbling about pay. Plus regular normal businessmen will eventually start to complain. And what happens come Carnival time? Is now self people go revolt. So personally, the question is a non-starter.
But lets say Kambo does go for the police state solution. Even if the citizenry tolerate that for a time, my firm belief is that although Trinidad is a limer country, and seemingly apathetic with most things, there is a radical element in this weird Caribbean Isle that manifests itself from time to time..Black power movement, Henry Sylvester Williams, Stokely Carmichael, Raffique Shah, Jamaat al Muslimeen, even JFK bombing terrorist,
plus long time people like Butler (though he was Grenadian), CLR James, Weekes, even Karl Hudson Phillips throw out revolutionary talk...these people weren't just talkers, they were doers. That element is still there. The sabres would soon start rattling. TNT better off yuh say? I would advise Kamla to pay the police. The brass is not happy it seems to me.
To answer your question more directly, there will still be an underclass that is not being attended to (same all over the world), and them still have to survive, so the drugs will start to flow albeit at a different time and life will become more perilous with killings, robberies and shootings by more daring and desperate crooks in the daytime. Not a better position.
The only solution is to deal with poverty and its attendant ills (easier said than done eh? but we've never even tried) and to improve policing. Curfew can't cut it.