This is not the US government investigating tax matters, it is individuals who have been defrauded, subsequently suing, and subsequently winning the case.
I know a tonne of people who are becoming accountants, and indeed some of them have conveyed that their job is essentially to work around the rules insofar as possible in the interest of the company. It would be a different world if we could criminalize this as an attitude.
We don't even have people acting fairly in our sports, we will NOT have it in the world in which we are currently living.
Btw Kintaro, thread lightly if you want a discussion.