Basically what he did was use independent contractors and paid them with 50 dollar US gold coins. Since they are legal tender for face value they legally got paid the face amount. Since their income was less than what was required to file taxes they didn't file. Of course the coins are one ounce and more valuable than the face amount. He is facing prosecution now.
Define which of these is "valuable" (has value):
A fifty dollar US gold coin or a fifty dollar Federal Reserve Note?
According to Black's Law (6th edition):
The money unit employed in the United States of the value of one hundred cents, or any combination of coins totalling one hundred cents.
A coin of the United States, the least in value of those now minted. It is the hundredth part of a dollar.
The above definition is circular and therefore does not define a "dollar".
From an earlier edition of the same dictionary (1st edition 1891):
The unit employed in the United States in calculating money values. It is coined both in gold and silver, and is of the value of one hundred cents.
A coin of the United States, the least in value of those now minted. It is the hundredth part of a dollar. Its weight is 72 gr., and it is composed of copper and nickel in the ratio of 88 to 12.
We have been deceived and our money has been stolen from us. Money is a medium of exchange and it has traditionally been something of inherent value to those participating in trade using that "currency". We now have a "fiat" currency, one dictated by law (force).
Federal Reserve Notes used to be "redeemable in lawful money" but are no longer. If they are not "lawful money" and are merely "legal tender", what is "lawful money" and do you ever get any in return for your labor?