carbon taxes are regressive insofar as the poor spend a larger % of their income on fuels than the rich and this is often not negotiable - people can't choose to e.g. not commute half an hour to work when they don't have much disposable income to start with, whereas the rich can generally pay for whatever quantity they want to consume already.
so the point of the tax (reduce consumption) unfairly hits the poor.
so the point of the tax (reduce consumption) unfairly hits the poor.