That's a fair point. Cocaine is a good example. When I was younger, Cocaine was a 'rich people's drug'. It was incredibly expensive. Of course, today it's much cheaper, but it's still more popular with the middle class decent earners.
The truth is, we don't view the addictions of the wealthier in society in the same light. The high numbers of professional, well educated people using a drug that causes teeth to fall out, noses to collapse, heart problems, etc, won't be subjected to the kind of vitriol about ignorance and stupidity we have seen on this thread.
To be honest, I am a bit fed up with the 'stupid, thicko, poor people' type of comments on this thread, however sympathetically dressed up. Plenty of wealthy high achievers are drug and alcohol dependent. These people might be able to afford the Priory, etc, but in an emergency, it will still be the good old fashioned NHS picking up the tablets for the ambulance, resuscitation and so forth.
We don't police those with every advantage, high education, decent professions like we do the average/poor. A documentary I watched a few years ago discussed the fact that Cocaine has become the new wine for the middle-classes, with a high percentage of young professionals using it to wind down after work, etc. Those people are not only contributing to an appalling, violent, not to mention illegal industry, they are also very likely to be burdening the NHS in the future.
Wealth and success don't make bastions of healthy living, they just change the nature of the poisons used and how it is publicly perceived.