The departure of promising young New Zealand Warriors back-rower Eliesa Katoa to join the Melbourne Storm has drawn a stinging criticism of the New Zealand sideโ€™s development programs from a former Warriors coach.

The Warriorsโ€™ CEO Cameron George announced Katoaโ€™s move on Sunday after granting him permission to talk to other clubs earlier in the season.

George claimed it was โ€œso much competition for spots in the back-rowโ€ that forced the 22-year-old to look elsewhere, but former Warriors coach Tony Kemp has told SEN Radio listeners that the claim is a bald-faced lie.

โ€œIf you think Eliesa Katoa should be gone because of depth in the back row at the Warriors โ€“ who canโ€™t make a break and give up a lot of penalties on these edges โ€“ youโ€™ve got rocks in your head,โ€ said Kemp, who coached the Warriors from 2004-05," he said.

โ€œThe reason you canโ€™t get this kid to the top of his ability is because your development program doesnโ€™t work.

โ€œYou put him in first grade and you expect him to do it all himself.

โ€œDonโ€™t give me โ€˜thereโ€™s too much depthโ€™ โ€“ youโ€™re sitting 14th, there isnโ€™t enough depth in your back row.

โ€œYou should have kept this kid and developed him like Craig Bellamyโ€™s going to do.โ€

Kemp went further, telling the Warriors CEO he needs to focus more on development and retention of young stars if the club wants to succeed in the future.

โ€œYou need to really have a look at your club development program. You canโ€™t keep bringing kids in.

โ€œDonโ€™t start sending your best kids over to Australia and giving them to Melbourne so they can go win a competition.โ€

The Warriors are currently in 14th position and on a four-game losing streak. They'll host the Bulldogs in Auckland on Friday night at 8pm local (6pm AEST).