[aianus]

The Canadian government subsidizes home-ownership by not taxing the capital gains on a primary residence.

I know the article is about empty properties, but it's actually a lot more common to send your 18-year-old kid to study in Canada and wire him $1 million to buy a primary residence in his own name.

[zaroth]

So what you're saying is... the rich will aptly avoid this tax just like they do all the others, and the hapless hoi palloi who might have to leave their home vacant for 6 months (e.g. to care for a dying relative) would be stuck paying the fine. Sounds about right :-(