Fair enough. Still, I'd suggest that the wealthy group indicate opiates scratch an itch which is probably unrelated to inequality. Even if we drastically reduced inequality, that itch would likely still exist. I'd also find it interesting if there was a comparison of the per capita ratio of wealthy addicts to poor addicts. It seems entirely plausible that a causal, not simply correlative, link exists between unemployment/poverty and 'bad' addictive behaviors, but something is hooking highly functioning, wealthy humans on opioids, too.

On a tangent, while I've never had chronic pain, I've had friends who have, and I know it can destroy anyone's life. I don't want to see the abuse of effective pain meds by some lead to difficulties in obtaining pain relief for those who really need it. Someone in chronic pain has enough to handle without worrying about maintaining access to appropriate medication.