So, in the spirit of paying GST on top of stamp duty, your employer paying a payrol tax, and then you paying an income tax, im am willing to bet the GST will be added after the cost of the carbon tax has been added to a product or service.
already seen a letter from Boral stating that all their products will rise 10% as of yesterday due to carbon tax, so immediatly, all new houses are going to cost 10% more to build, Minimum! and i wont worry about the letter informing me my rates will now increase $24 a quarter due to the tax.