That's the idea of progressive taxation. The rich pay a higher rate of tax because they can afford to and the less well to do pay a lower rate. Sounds fair to me but the rich have lobbied hard and successfully to reduce their share of taxes in recent decades and the result is the huge and ballooning inequality of wealth.
Really , I'm pleasantly surprised to see the G&M print this . The Thomson  family, that owns the G&M is on that list of Canada's billionaires.