Right now with RRSPs, that is money that goes in before taxes, so in fact the cost to the treasury is immediate, whereas for the tax-free savings account that is after-tax dollars. Those investors who have put money into tax-free savings accounts are putting in after-tax dollars. They've already paid taxes to the government, so therefore the potential cost to the treasury is actually down the road.
On April 28th, 2015. See this statement in context.