> Taxing wealth is much harder on a practical and algorithmic level than taxing income.

I find this argument somewhat unconvincing. Where is most of the wealth? In hard assets, such as real estate and financial assets, such as stocks and bonds. The former are very difficult to hide, for obvious reasons. As for the latter, the ownership of every single share is recorded in large databases (e.g. DTCC, Clearstream and Euroclear). In that sense, the "physical location" of most of the wealth is well known, so in theory it should really not be difficult to tax it.