In Brazil, possession of drugs for personal consumption is punished with educational measures and community service, not prison. In this video, a young man tells of the disparity in sentencing between the wealthy and the poor.
I spent a week over the summer lecturing in New Zealand where I had the chance to speak with a number of politicians, lawyers and health professionals who were engaging in a review of their drug and alcohol laws under the leadership of their Law Commission. This independent body has made sensible recommendations that would reduce drug and alcohol related harms by providing more just laws but is experiencing a similar stonewall response from their government as we have from ours in the UK.
(See also: Drug Law Reform: Lessons from the New Zealand Experience, Series on Legislative Reform of Drug Policies Nr. 8, August 2010)