That doesn't mean that the tax effectively targets that wealth. Besides, it seems intuitive to me that if you were stranded on an island with 9 other people, you would want the smartest and strongest people to share a disproportionate responsibility for the management of resources. Everyone would be better off that way.

Attacking the rich simply for the fact that they're rich doesn't seem productive or rational to me, there has to be an actual assessment of merit, and the nature of any unmerited wealth should be directly targeted by dismantling. Otherwise directly redistributing massive amounts of wealth just seems like attacking the symptom rather than the problem, and is likely to just exacerbate the issue by creating more avenues for loopholes and other kinds of crony capitalism like we saw in previous eras of high taxes.