>> The idea that you can squash a market with inelastic demand is soundly dispelled by all current and historical attempts at doing so.
> The demand comes after the addiction. Remove addiction and the demand is reduced.
To me the latter statement reads like: "If you can create a perpetual motion machine then energy would be free"
This is the very problem, using impossible potential ends to justify means.
>> This is an outcome that clearly cannot be brought about by the war on drugs...
> That's the current war, not the one based on evidence. What if the evidence showed that a different war could improve society on average and reduce hard drug usage? For example, instead of taking away a user's property and imprisoning them, you give them rehab and (if needed) job skills and actually find them a job, and any other assistance that costs less to provide than the monetary value of the drain on society they'd otherwise be?
Maybe I'm just a pessimist, but I don't see anything that's at all hinted at a remotely workable solution that would have such an effect. You seem to be assuming that we can somehow overcome all of the imperfections of past policies but do not offer a clear, strong novel mechanism by which that can happen. In the meantime our current policies are enormously destructive, and I see that as the more pressing issue. Really, solving addiction and substance abuse is a problem that is not very closely related to criminalization policies, but it's those criminalization policies that are leading to broad 4th Ammendment violations, police militarization, and unnecessary deaths and incarcerations.
[edited to remove the implication that no solution was offered, but rather that a new solution wasn't offered that could reasonably be expected to end addiction and substance abuse in a significant way]