IMO there is no doubt that the players and player managers would have known everything. The players sign off on the NRL contract that is then lodged with them (NRL), which declares their salary and payments. They are also in receipt of the 2nd contract (kept in the 2nd office) which details the actual amount that they are going to be paid, which is what they had agreed to accept when they agreed to resign.
Clearly, Waldron, the player and the manager would have been involved in direct discussions about this is what we will pay you, but this is what we declare on the formal NRL contract and this is what will be paid as extras in this way, we are talking huge amounts of monies here as individual "overs", of course they were a party to it all and knew exactly what was unfolding.
They then recieve the balance (2nd set) of payments via third parties, which annually clearly exceed what they had signed off on in the NRL contract. I don't don't this is rampant throughout the NRL.
IMO some players have to be made examples of to also make them think twice.