THE CANADIAN PRESS Conservative MP Pierre Poilievre stands during question period in the House of Commons on Parliament Hill in Ottawa on Oct. 5, 2017.

The words coming out of a Conservative MP's mouth were a bit too rich for Peter Julian on Thursday, prompting the NDP MP to shout an outburst during question period. It happened while Conservative MP Pierre Poilievre attacked the Liberals' proposed tax reforms, targeting the finance minister's company, Morneau Shepell. The Carleton MP pointed out how the company has a registered subsidiary in Barbados, a popular tax haven for Canadian companies. Poilievre repeatedly asked why the government hasn't done anything to address the 1980 Barbados treaty that gave way to tax evasion schemes — which seemingly annoyed Julian.

"The Conservatives signed it!" Julian yelled before being chided by Speaker Geoff Regan for unparliamentary behaviour. "I would ask the member for New Westminster—Burnaby to try to restrain himself, and I do not want to hear that kind of outburst from him again," Regan said. Canadian tax havens increased in 2009 Barbados is the No. 3 offshore destination for Canadian companies to park their cash, according to StatCan. The Caribbean island sheltered some $68.3 billion dollars of direct Canadian investment last year alone. The incentive for Canadian companies to bring money to Barbados is its low tax rate (up to 2.5 per cent). So by creating an offshore subsidiary, companies can pay low taxes on international profits and repatriate those profits back to Canada, tax-free. And that's because of a treaty signed between Canada and Barbados in 1980 by Joe Clark's Conservative government.

Toronto Star via Getty Images File photo: Then prime minister Joe Clark forms zeros with his hands to show how many policies the Liberals have on Feb. 14, 1980.