WE'VE heard plenty about the carbon tax but haven't heard from plumbers, writes David Penberthy. IN a telling intervention that will change the dynamics of the debate, 13 of the nation's plumbers have spoken out about the controversial carbon tax. The group of 13 took time out on Friday from digging ditches and unblocking toilets to issue statements about the tax. The eminent plumbers represent more than two centuries of combined plumbing experience and have worked on hundreds of plumbing jobs across our nation. It is the first time a group of plumbers has united in commenting on such a...