This issue with Jamie is probably deeper than any of us can know.
It seems so screwed up - one season he's Australia's best centre, the next he just doesn't want to play. Whatever's happened since just adds to the confusion of the original issue.
For me, coaching staff need to also have a motivating role. Look back at Jack Gibson and his caravan, where players could call around day or night about any issue in their lives - and that was when players still had other jobs! Now players are paid fulltime, and the club isn't clued up on how important the satsifaction in players (other) lives are to their work performance.