That's not really relevant.
The proposition is to tax people who own property but do not reside there in.
My question is how does the Gestapo know where an owner lives.
For example, if my wife and I own our home and have a holiday home by the sea, we would simply say that one of us resides in the holiday home, and it's not practically possible to disprove that.
This comment chain is not specifically about non-eu residents.
Letters do not confirm where someone lives. It would be trivial to work around that.
This might shock you, but if you announced a law whereby everyone has to go to the police station once a year to confirm where they live there would absolutely be blood in the streets. It's a ridiculous over reach and a gross invasion of privacy.
In tax legislation the goal is to be broad based, which means easy to administrate and difficult to avoid.
The solution to this problem which people have been talking about since the 1940s is land tax. Tax the fuck out of all land, but allow people to apply for an exemption for 1 property. It will never become law because the powerful people that make law own property and do not wish to pay tax.