Canada

What's the number between foreign buyers

There's a video by Economics Explained that reviews this law change from an economic perspective. At around the 10 minute mark, he shows a chart of the country that breaks down provincial reporting of foreign property purchases. Not every province tracks this stat, but for those that do, foreign buyers are responsible for around 3%-6% of all purchases. Even then, this law didn't ban all of those purchases. There were so many exceptions that most foreign buyers could still buy all the property they wanted. I'm not sure that anyone tracks if a property buyer already owns property.

The video suggests, as does the OP article, that this was likely a political stunt to make it seem like the government is doing something while not actually doing anything. Actually lowering house prices comes with economic negatives. For people who already own houses, their house could then be worth less than their mortgage, a decline in GDP figures which many see as an indication of a recession, and a decline in stock market value since so much of it is now tied to real estate assets. The government wants to avoid hurting the economy while appeasing people who see houses as something to live in and not as a financial asset.