Harm reduction rather than punitive punishments are better for health outcomes, reducing drug addiction, and society more generally. Sometimes, I wonder how different the world would be if our first impulse was to help rather than to punish.
I feel like this would not be helping the people with drinking problems. A heavy drinker is likely to spend more than $5/day on drinking so they already value $5 as not worth abstaining from drinking. It could help some subset of problem drinkers though.