I think this is total bullshit. He paid 917,000 instead of 921,000 (the $70,000 comes into play only when you figure in the penalties). That doesn't scream "tax evasion" to me. It's not like he's some asshole arguing that God and the Constitution say that only people in Washington, D.C. are "citizens" of the United States and no one else has to pay income taxes.
If Al does his taxes like I do mine, he puts all his shit in an envelope, sends it to the accountant, and signs whatever the accountant sends back to him. If you're going to hold that against him, than I can't imagine who on Earth would fucking pass muster.
I don't know anything about the worker's comp stuff. I can easily imagine it's the same thing, where he signs whatever his business guys tell him to sign. Maybe not.
What a crock.