How has all this information form the IRS leaked? ProPublica seems to have accessed many of the richest American's tax data. Is this something one person could do? How many people have that kind of access?
What's puzzling is how apparently selective the leaked material all is. ProPublica has all these very specific memos and tax return info about Thiel's Roth IRA, and yet, they are only aware of Thiel's long IRS mega-audit (and that he won 100%), and don't know that it was in fact all about auditing his use of the Roth IRA trick? (Or that Fortune reported about the Paypal mafia's use of the Roth IRA back in like 2009?) Very odd.
(Similar issues came up when people wanted to see Trump's tax returns to find out "if he was really wealthy". They wouldn't show that. Of course they might show a lot of other things.)
[0] https://www.propublica.org/article/how-the-irs-was-gutted