0.7% of GDP development aid target = revenue from a $30/tonne carbon tax, numerically and morally

At the recent Carbon Pricing and Environmental Federalism conference in Kingston, Ontario, one thing that was brought up by a couple of speakers (one of them was Matthew Bramley of the Pembina Institute) was the idea that taxes on greenhouse gas emissions, "carbon taxes", are actually a "recovered subsidy", and that, as a consequence, one could argue that it was more fair for the federal government to collect this tax (as opposed to provincial governments).

Let me explain this a bit before getting to my idea. Greenhouse gases are causing climate change, and that will be bad for everybody. Right now, people get to emit greenhouse gases (from burning fossil fuels) for free. But it's really not free because people in the future that will be burdened by climate change will pay the price. In effect, those people are giving a subsidy to the people who pollute for free today.

Money collected from a tax on fossil fuels would recover some of this subsidy. Who should get the proceeds? Well everybody benefits from reduced greenhouse gases, and the federal government would seem to have a better claim to represent "everybody" than individual provincial governments. Therefore, from this point of view it makes more sense that the federal government deserves the money.

Now to my point. Why stop there? We know that people who will really pay the price for climate change are the poor who live (or could have lived) in certain developing countries in the future. Aren't they the ones who are morally entitled to the proceeds of our carbon tax (in whatever form it is implemented)?

If you agree with my point then consider this: a $30/tonne tax on CO2, as proposed by the third year of Stephane Dion's Green Shift plan, would generate about $11b in revenue. That's coincidentally about 0.7% of Canada's $1.6 trillion GDP. Perhaps we should be considering fully funding Lester Pearson's (and the U.N.'s) suggested international development aid target using a $30/tonne carbon tax, and concentrating that aid on development that will prepare future generations to deal with climate change. What a great way to try to settle our debts and respect intergenerational equity.