Australian players are expected to earn almost 10 times more than players from other nations at the Rugby League World Cup, highlighting a major pay disparity.
The Rugby League Players Association has backed Samoan star Spencer Leniu, who spoke out about the difference.
RLPA chief executive Clint Newton said in a YouTube video statement: "We see tremendous value in the international game, but unfortunately we weren't able to secure a revenue share agreement with the NRL."
Newton praised players for pushing their nations' interests, particularly on payments and standards.
He urged the NRL and RLPA to cooperate so the "beautiful little nations" Leniu referred to can receive more revenue from events such as the World Cup.
"Peter (V'landys) has great plans and big visions, particularly internationally, and there's a great opportunity to grow exposure, grow revenue and bring more funds into these nations that are contributing so much," Newton said.
He said future progress depended on trust, respect and financial openness, adding: "There's a tremendous chance to move forward, but obviously we can only do that with full transparency which, to date, we haven't received."
Newton identified the intellectual property associated with international team brands and individual players as an area requiring attention.
"This is only the beginning, the players have to be at the centre of the decisions," he said, urging NRL and International Rugby League leaders to work together on better opportunities for future tournaments.