@ChrisMayLA6 @GhostOnTheHalfShell
The article says the retroactive provision was dropped before the vote. It focuses mainly on the competition between tax havens to attract the superwealthy - which could be a factor in Switzerland, but not larger countries.
I think there's a whole cluster of myths around the superwealthy that are widely believed among the non-wealthy, and which need to be challenged consistently by the left. For example...
'The American Dream' - that although you are not wealthy now, you can become wealthy, so wealth taxes will hit you later.
The superwealthy are 'wealth-creators' whose investments and spending create jobs, etc, and benefit everybody.
The wealthy earn their money, so it belongs to them and shouldn't be taken away.
And of course the point in the article - that taxing them will make the wealthy leave the country, or not move to it.
None of these have much truth in them, but they are not easy to challenge - largely because the real truth is complicated, and often comes out of detailed evidence rather than easy-to-communicate fairytales.