"climate change is real and that the costs of inaction far exceed any carbon tax today"

Actually, since any action we take here in Canada will have a NET ZERO affect on total global GHG emissions meaning global temperatures will continue to rise, it would make sense to save your money and then spend it adapting to the changing climate rather than paying into a government tax that will do absolutely nothing to reduce total global GHG emissions and may actually cause them to rise.

Who will want Canada's high priced (and low GHG) products to be part of their supply chain which will make the end product more expensive when they can buy cheaper parts (with a higher GHG cost) elsewhere?