Sales of alcohol have large negative economic “externalities” – “negative economic consequences of an economic activity (sale of alcohol) experienced by unrelated third parties”.  “When sober he is a good loving man”, says the repeatedly very battered woman with her multiple abused children to the fleets of rescuing police, medics, social workers.  “Lucky we managed to find a donor for the liver transplant” say the fleets of physicians, nurses, technicians attending.  The economic costs incident to the consumption of alcohol, consumption made possible by the sale of alcohol, come to rest where the alcohol is consumed.  The alcohol sold in Quebec (tax revenue for Quebec) is consumed in New Brunswick (no tax revenue) where the economic externalities will have to be borne by New Brunswick taxpayers – costs of police, doctors, nurses, social workers, etc. etc.  I note this one who greatly enjoys fine wine, craft beer, single malts, and much else alcoholic -- not the rant of teetotaller.