"I don’t tend to say this publicly, but we can see it’s a curative thing. The narcotics industry is also enormous. It funds terrorism and - this is a huge problem in America - fuels the foreign gangs. More than 85% of men incarcerated in America are on drug-related offenses. It costs $40,000 a year for every prisoner. If they were really serious about the economy there would be a sensible discussion about legalization."