This, umm, "theory" regarding the Candian Parliament being a systemic breeding ground of dictatorship must have been a leftover April Fool's joke. The ability of any single person to order other people to do exactly as he demands is completely contingent upon the spinelessness of those he seeks to order about. There is nothing in the Canadian or British parliamentary systems that compels members of parties to vote the party line or to acquiesce to a prime minister declaring himself Lord of the Universe. The absence of an opposition party in a provincial legislature, as cited in the article, is the result of the whims of the electorate, not the machinations of the prime minister. Furthermore, there is nothing inherent in the American system that prevents a U.S. president from attempting to act dictatorially. There is, for example, the case of Lincoln and his numerous violations of the basic Constitutional rights of Americans during the War of Secession. Therefore, it is absurd and troubling that ill-founded and hysterical agitation is being directed at Canada. One is bound to question why this being done, and correctly so.
"There is nothing in the Canadian or British parliamentary systems that compels members of parties to vote the party line or to acquiesce to a prime minister"
If you are a Liberal MP, and don't do what you are told, then you can can be kicked out of caucus and /or have the the party leader refuse to allow you to run for re-election. In short, it's a career ender.
Yes, they could still do it and take consequences, but if they had that much character they wouldn't be Liberals in the first place.