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Beyond Meat boss Ethan Brown told the BBC he is in favour of a "pigouvian tax" on activities that create adverse side effects for society.

One great thing about the gas tax is that it’s what economists call a Pigouvian tax: a levy on an activity with significant negative externalities.

Washington state’s proposed levy is a textbook “Pigouvian tax” which should come as no surprise since it’s the brainchild of an economist: Yoram Bauman, who previously taught economics at the University of Washington.

It's called a Pigouvian tax after the British economist Arthur Pigou who set out the case in a 1920 book.

In that regard, the FTT is a Pigouvian tax: a tax that offsets the significant, external costs imposed on the larger society by activities like smoking or polluting.