Precisely. Pseudonymous is not the same as "anonymous".
Lets say the IRS are watching this (and why wouldn't they be?). They now know a multi-million dollar transfer has happened, and are beginning to track it down.
I wouldn't be surprised if multiple investigations were launched. The downside is that they lose a few thousand to a few hundred thousand dollars in employee time. The upside is that they potentially collect millions in taxes.
Lets say the IRS are watching this (and why wouldn't they be?). They now know a multi-million dollar transfer has happened, and are beginning to track it down.