I can reel off anecdotal information about how the cash in circulation helped the southern american countries pay off world bank loans, via drug cartels and the taliban were 'taxing' some drug lords in Afghanistan. Drug dealing provides an employment route which is dangerous but sometimes lucrative.

Queen Bee that is a strange topic to choose as it is one that is universally accepted as wrong for your health and backed up by a weight of scientific fact much like smoking. Scientific debate is much more different to social science / theological debate which doesn't always have data to back it up.