I would have to disagree. People show up at DriveClean tests every day in Ontario, to be told that they can no longer register the car unless they make thousands of dollars in repairs. Often, these people are the poorest in society, and buying a $1000 catalytic converter is a hardship to them.
It is quite likely that the Ontario government would say "VW offered to buy the car back. You declined. Your choice. You may no longer register it in Ontario, as it does not meet emissions."
I have to disagree with you ... it shows you are not into politics ..
... This would be quite suicidal, especially for bottom-of-the-barrel popularity of Wynn.
The case you describe is clear and law as well ... something malfunctions on a car which is out of emissions warranty on your vehicle. So you have to fix it out of your own pocket to get a pass (unless there's a past warranty recall etc.)
With our messy situation, it's not quite like that. The car functions fine, but the car manufacturer has been caught implementing an illegal design which if removed does not pass not because CEL, but rather a flag in computer stating that this car is no good due to "VW dieselgate" . Nowhere it says, that I should be carrying the burden in such a case by not being able to register my vehicle.
Now, if they offer a fix for all cars, it will be harder to argue against the province if you refuse such fix and buyback as well. But I would assume more lawsuits coming since some people will argue that their car is not the same after a fix .... big can of worms.
In another words, if they are smart, they will let it go, especially considering the piddly amount of vehicles we are talking about (I would say 60% will end up being bought back) ... so, out of 40K you will have what 10 or 20K left with stubborn owners who don't want fix, but want their plate.
Also, don't forget the fixed cars are still not what the standard calls for .... and they agreed to that already.