In the Netherlands we already have wealth tax (capital gains tax, but doesn't care whether you gained or not). It's nothing particularly disruptive. We still have the most wealth inequality in all the world. It might be a bit pointless to tax wealth in addition to capital gains though. You could just raise the former instead.
I think you need to revisit your assumption about wealth inequality in The Netherlands. It’s on par with that of most of Europe, significantly lower than in the US [1].
You linked an income inequality graph, which is distinct from wealth. If you look at the list on Wikipedia [1] and sort by Wealth Gini (2019) you will find that the Netherlands are #1.
A bit surprising, huh? According to this Wikipedia page: https://en.wikipedia.org/wiki/List_of_countries_by_wealth_eq... The Netherland, indeed, is the worst. It's close to having a minority own everything while everybody else has 0 (a 1.0 coefficient).
see page 199 in this dataset[0] which is the dataset used for this list of countries on Wikipedia[1]. If you sort on Wealth Gini (2019), then Netherlands is ranked first.
In that case, perhaps the issue is not the existence of a wealth tax per se, but how large that tax is. I'm also dubious about the Netherlands having "the most wealth inequality in all the world." Do you have a source for that?
