The Reagan drug policies directly caused an inflation in the incarceration rates, helped to fund the path towards the current militarized police departments we now see standing behind tanks to stop protestors, and helped to turn the crack epidemic (of questionable origins) into an even greater force for destroying the families and communities of poor minority socioeconomic spheres. 

The government abolition of drugs has been a money garnering scheme since its inception that has been used to target poor communities. The opioid epidemic has mainly been caused by drugs that were entirely legal while pharmaceutical companies are making record breaking profits. Too act like marijuana isn't readily available in Hawaii is an act of purposeful ignorance so the true question is who stands to earn what whether marijuana is legal or not.

Last I checked Colorado made a billion dollars from legalization.