The absence of economic damage is not evidence of economic growth.

The author concludes that he found no significant negative effects from Norway’s wealth tax reforms. But I think he misses a more important question: Did the reforms contribute to economic growth?

If the economy isn't growing, that is a problem. And if a tax reform fails to improve growth, then the tax only increased government revenue. This might be good thing for goverment, but it bleeds enterpreneurs.

If there is no evidence of a positive contribution to economic growth, I wouldn't call it a successful growth reform.

Then, I think, wealthy people can take more risks. They have enough resources to start over if something does not work. Risk takers have their role in innovations for example.