It’s going to take quite a while to determine exactly why the Federal income tax revenue fell by about $5 billion in 2016. According to the Globe & Mail high-income earners paid $4.6 billion less in taxes in 2016 despite a higher tax rate. One thing that stood out was that Albertans accounted for 93 percent of the decline among those in the top income brackets. It was a similar in lower tax brackets as well.

Read more: Alberta accounted for 97% of federal income tax decline during recession’s height