Huh? You do realize that would predominantly hurt asylum seekers, right? Because if the (christo)fascist hellscape doesn’t have a tax treaty with anyone, nobody can leave

The way that many (most?) countries handle this is that you are still on the hook for your taxes. If you never come back? Whatever, not their problem. If you DO come back (for example, because your visa expired and you have to renew it) you are in for a world of hurt.