There's only so much room in the center of the capital, and making more costs a titanic amount of effort. Even that runs out eventually, as you can only build so high.
Otherwise, why would we be having a problem? Move to Serbia and buy an apartment for $40K.
* Speaking the language -- in some places they don't speak much English, and certainly don't do official paperwork in it.
* Local laws
* Safety
* How much stuff you need is going to be nearby
* Internet access
* Local culture
* Employment
* Friends and family
Like, I don't know much about Serbia (just looked up where housing is cheap), but from what I hear I could get a pretty good deal if I moved to Russia -- they're desperate for tech workers and offering some very good perks regarding mortgages and so on. But on the other hand, is living in Russia that good of a deal right now? I don't think so.
They've got a bad government, slow and very restricted internet access, a not terribly pleasant society overall in my impression, and the economy is circling the drain due to all the sanctions.
I'm on 1Gbps fiber, and can get 10G/10G fiber for cheap at my home right now, and just finished with the preparations.
Until we develop Star Trek teleportation I cannot replace my apartment with a cheaper one 1000km away.
That's why hoarding real estate is exploitation of people's basic needs.
I would advise against specifically fining empty homes, because then you have to define what an empty home is; and that will have lots of weird grey areas.
That being said: fining/taxing is still better than banning.
How much is this a problem?
Further, this does not (IIRC) apply to folks to have permanent residence status or folks here on things like student visas.
So how many never-set-foot-in-Canada people are buying properties?
Plenty of Canadian-born people rent.
We know it was a significant issue because the government actually shared the data, and it showed some alarming trends.
What is remarkable here in contrast is that the Federal government hasn't shared any data at all. (Ironically when they were elected in 2015 they promised "evidence based decision making" ..haha)