I hope Morneau and cronies have been looking at Kansas and its "Real life experience" with the Trump/Mnuchin  tax voodoo plan/con of cutting taxes and somehow having more money for government essentials.  Kansas is in such dire straits that their Republican held government has voted for tax increases.  In Canada too, as mentioned by CuriousGeorge, we can't keep spending money we don't have on improperly planned and budgeted stuff.  Part of budget discussions should include the full cost of the "mortgage" .  Refer to   "Kansas Rises Up Against the Trickle-Down Con Job" 
https://www.nytimes.com/2017/06/09/opinion/kansas-tax-cuts-sam-brownback.html?_r=0

Britain also fell for the trickle down con job with extremely low tax rates for the uber-wealthy and it didn't work out so well for them either.