> Of course, it also incentivizes getting the supply back up.
I think you answered yourself, didn't you?
One thing I've observed about (legal or otherwise) markets with inelastic demand is that temporary supply shortages tend to translate into permanent price increases.
So, what DoJ has accomplished is a pretext for dealers to hike their margins, and an incentive for desperate addicts to rely on more violent means to support their usage.
Basically, Merry Christmas and a Fucked-up New Year...
If you're addicted price won't matter. You will find a way to get that money and that probably means theft/mugging etc. The only people hurt by this are ordinary citizens.
Less supply means less consumption, period. Increased price is just a mechanism that determines who still gets to consume how much.
Of course, it also incentivizes getting the supply back up.