Taking out "citizenship-of-convenience" and holding a passport of a country as a safety net for 25 years and becoming a burden without committing to the place or contributing anything of worth - what a slimy lowlife.
The Canucks should revoke the citizenship and turn him/her back at the airport but they are far too limpdick leftwing socialist for that sort of action - which is why they're being overrun by parasites like the author of this article and the rest of China plus half a billion indians and tamils.
Jeez, who rattled your cage to invoke that invective?
Having a passport/citizenship of another country does not generally make you a burden to that country, and usually incurs certain obligations and costs to the holder.
By your reckoning I'm a 'slimy lowlife' too, so is my son who holds two but is entitled to three, and so, I would imagine, are hundreds of thousands of people all over the world and no doubt many Ppruners too who hold multiple nationality.
Edit : Add : In the case of HK, I don't know, but I know that in our cases there was no requirement to rescind another nationality.