BC has already implemented actions to limit foreign ownership without them actively living in the residence. Probably more to be done though, but one needs to be careful about unintended consequences.

They did but they left so many loopholes that was it was basically pointless. Foreigners simply started making an incorporation or using any of the quick "PR" schemes to be able to purchase a property.

Many people will even pool money from the multiple families if need be to purchase residence and then renting it to Canadian citizens for profit or putting on AirBnb.