I suspect once Roby joins the World Cup Squad he will be influenced by the english players already in the NRL, Jammer is already advising him to give it a go in Oz.
McManus needs to up his salary otherwise Roby will see the big money in Oz difficult to resist and the challenge to play in the NRL before his career finshes is another factor.
I reckon if he puts in good performances in the World Cup most of the NRL will be in a bidding war for him and we lose our only world class player at the club.