The article is absolute garbage and falls into the category of fake news.  Perhaps the Globe and Mail took the piece for free as a favour for someone's church  "They forget the underlying assumptions, namely that trade consists of the balanced exchange of final goods under freely floating exchange rates, with no capital mobility between countries and full employment."  If there is no capital mobility, there is little trade.  Perhaps they are bartering.  Regardless, there is no 'balance exchange of final goods" per economic theory.  There is, in economic theory, a balance of payments which includes trade, capital and foreign reserves.  Be advised that contemporary economic theory, where it comes to floating exchange rate,s includes monetary independence and absence of controls i.e. tariffs and barriers.

Politics for economics? It is very distasteful to pay the Globe and Mail for informed opinion only to find that the Regime is selling cross-eyed farts for irrelevant advertising.