I am all for a healthy debate on the topic, but I disagree the reporting is responsible. Responsible reporting, in my opinion, would involve nameless "there is a $5 billion Roth IRA out there... the system isn't working", rather than naming private citizens who believe their tax returns from 2005-2020 are private information.
Edit: And I think it may be of public curiosity to know about what goes on in the billionaire class. I get that, to a degree. My original point was that ProPublica is admitting that they are in control of thousands! of American's tax returns for the last decade and a half. There is no guarantee that the IT administrator or summer intern is going to keep that data safe.