Age: AUSTRALIA should use the massive revenue boost from new climate change laws to abolish stamp duty and other “inefficient” state taxes, Opposition Treasury spokesman Malcolm Turnbull will argue today. In a speech to the Sydney Institute tonight, Mr Turnbull will say some of the money reaped from forcing businesses to buy permits to emit greenhouse gas – up to $20 billion a year by 2020, according to lobby group the Climate Institute – should be used to overhaul the tax system and help …