Cultural relativism aside, I’m sure we can agree on “terrible” if we talk it out. I’m not asking for a “well X country is worse than Y country, so, Y country isn’t THAT bad”. I’d say for this discussion we can go as far back as 1800 for “past” as I’m currently convinced there isn’t a country with a perfect track record going back even that short a time.
Switzerland implements the OECD standards for automatic tax information exchange with other nations, and has done so for a long time
So let’s say a Swiss bank has a literal ton of Nazi gold from 1940s. They would automatically inform other nations of that pile?