that doesn't make a whole lot of sense, for two reasons. For one, as even Paul points out in the piece, a wealth tax below what's practically a risk free return on capital (~5%) doesn't eat into the capital stock, it simply means wealth grows slower, but still increases.
Secondly, there's no monotonous historical direction towards higher wealth taxes, in fact the opposite. We're living in an age of low wealth taxation, with only half a dozen countries or so, if I'm not mistaken, imposing one at all.