Here is my source. WSJ is biased in general but their reporting of tax loopholes here is legitimate. Avoids accumulated capital gains tax on all transferred assets. $18B in gross assets.
Transcript at the bottom. Coincidentally, Reich offers anecdote regarding Soros and taxes at about 30 minutes into interview. However, I'm posting this for its general coverage of the topic. (edited to clarify)
https://news.ycombinator.com/newsguidelines.html