You have to look at what this proposal is replacing. In the current system, sellers collect the amount of tax from purchasers on top of the purchase price, add that amount to the tax already collected and send everything to the Canada Revenue Agency or Revenu Québec, depending. Purchasers then wait for the next declaration period, generally the next month, and reclaim the input tax credit. As I see it, the current system is more burdensome than the proposed system.
On November 6th, 2018. See this statement in context.