In an attempt to deal with an affordable housing crisis, the Dutch housing minister recently proposed a law that would have allowed municipalities to force some property owners to sell their homes only to low and middle-income earners. The problem the policy is trying to fix is one that’s particularly acute in Canada.
There can be some good reasons to own multiple homes, so rather than banning it you tax it. That way people can still do it and the city gets more funding for allowing it. Those that can’t do the tax will sell down.