When you think about it, the money isn't even the issue. The NFL couldn't possibly pay officials enough money to keep them from throwing a game if they really wanted to.
Refs make $10 grand a game plus expenses. The average ref takes home $200 k. A guy connected with Vegas like Hochuli can leverage that to make $millions, if he works for his masters correctly, IE, is not caught. But he is a lawyer, so he knows the rules of admissible evidence.