You are full of sh*t. Drug addiction began in this country as a result of Soldiers in the Civil war (both sides) being treated with medication for pain relief. At the time, no one knew that stuff was addictive, but after the civil war we ended up with 400,000 drug addicts.
Also have you ever heard of this little thing called "Coca Cola"? It started out as wine mixed with cocaine, but it quickly changed into Soda Water mixed with cocaine. People loved it. It made them feel great!
Now what do you suppose was happening as people started buying more and more of this refreshing beverage? (and others which were on the market.) Educate yourself and stop repeating that libertarian propaganda.
I would rather treat 10 million drug addicts than pay for imprisoning 5 million.