I think you seem to have the idea that in America one can walk into a pharmacy, slap a Benajmin on the counter, and say "Hey bartender, gimme 150 Vicodins". It doesn't work that way unless you live in the projects. opioid abuse is definitely prevalent in USA but it is probably easier
This is almost a socioeconomics question. I personally think that developed nations would spend more per capita on entertainment and luxuries (such as drugs) compared to developing countries. But in reality it seems that countries that are capable of producing the drug are the major consumers.
It may suprise you, but
America isn't actually the largest consumer of opiate drugs in the world. Nor is Tasmania the world's largets producer of opiates - Afghanistan (suprise!) is. As for pharmaceutical opiates, I cannot say. Pharma comapnies operate in mysterious ways, often to the detriment of the drug abuser.
So we can deal with how fucked up our country is. Kinda numbs the pain.
Americans in particular seem to love their drugs, even if doing so makes them a hypocrite... the 'public image' of certain drugs has been so ingrained over the years (see: Tony Montana) that doing them becomes desirable.
Realistically, if you're an opioid user in the US you fit into one of four groups.
Those who do opioids with prescription for pain control. (legal usage)
Those who acquire opioids via prescription for gray-market resale
Those who do opioids for recreation
Those who grow/process their own (pod tea, NZ homebake labs, etc .. small fry in the grand scheme of things)
I, personally, think most modern drug policy can go take a long walk off a short pier, but that's just me.
Mod Note: This thread is rather rambling and should be folded into the social thread.