If we have different goals that are both achieved by the same means, I don't see the problem. I think raising money through the tax is important, but I think a

If we have different goals that are both achieved by the same means, I don't see the problem. I think raising money through the tax is important, but I think a more important long-term function of a wealth tax is to ensure that large fortunes eventually revert to the mean rather than sustaining in perpetuity for generations. (Unless they continue to be invested with above average returns for generations.) Also - there are many taxes that exist not for the purpose of raising revenue, but for the purpose of a policy goal. To deny this would be to deny how a great deal of how modern public policy works.