Policies over large numbers aren't about %100 enforcement, a general behavior modification is considered a success usually.
That being said I'm happy to be proven wrong, but can we expect any sort of data to support a hypothesis? I'm not sure as I'm unfamiliar with Canada's policies on access to public data.
Yep. You can see that with wealth taxes. Most countries that have wealth taxes (e.g. France) make close to nothing from them, because it's inefficient to verify and collect all the data to properly levy the tax, and you need a lot of civil servants for that.
There may be some question with privacy (e.g. proof of leases/lessee), corporate-owned residences, etc. but I'm sure they've factored that into things. The big deterrent to lying about it is probably the magnitude of the penalty for doing that - it's kind of like Martha Stewart: she didn't do time for insider trading, she did time for lying to the FBI (about insider trading).
EDIT: and the goal isn't to make revenue, it's to free up rental stock. If all the money collected goes towards enforcing the system and 20,000 vacant units end up in the rental market, then the policy is a total success.
About 5% of Melbourne's housing stock was recently found to be unoccupied, using water usage data. It was closer to 19% for investment properties.
http://www.abc.net.au/news/2016-04-18/call-for-vacancy-tax-o...
"Why didn't you use any power?!?!" "I have solar"
"Can you give an alibi!?!?" "I was home alone"
"Not good enough, pay up!"
Yes, it can be enforced.
For example, in the US. Housing associations have staff that run around in cars taking photos of literally everything. Grass too long - Fine. Bins out outside of trash date - Fine.
This happens daily. I know because I used to live at an HOA.
My point being, hire individuals with cars to keep track of houses. Have photos of non-residency and then impose heavy fine to recoup costs.
This is a big difference between the west and a country like the PRC where strong rule of law isn't a given. In the west, they will simply ask, with the caveat that perjury is a serious crime if you are found out. In China, they will figure out another way since trust isn't assumed and lying is considered a much weaker offense. Completely different systems.
(The PRC is trying to go in a trust direction with income self reporting, but it doesn't affect the taxes you pay, oddly enough.)
http://www.calgaryherald.com/vancouver+slaps+year+empty+home...
(Vancouver slaps $10,000 a year tax on empty homes. Lie about it and it’s $10,000 a day)
> When you're throwing two million dollars at a house,
> sight-unseen, that you then let stand empty for years,
... you're not breaking a sweat paying the $20k.It sucks, you'd rather keep your $20k, of course. But it's not worth risking cheating it...