"If we are serious about making the finals a quality series we need weed out those teams that don't have consistent enough form across the season to deserve a place in the playoffs,'' he said on the Wide World of Sport website.
Currently sixth on the ladder, the New Zealand Warriors coaching staff and players were unwilling to comment on the matter ahead of their pressure match against the Penrith Panthers on Saturday night.
The Warriors were the first team to beat the first-placed team in week one of the finals, after finishing eighth in 2008.
The Parramatta Eels, went on to match that achievement in 2009 prompting beaten St George Illawarra Dragons coach Wayne Bennett to criticise playoff system.
He said there was little reward for finishing in the top four under the NRL's McIntyre system (the name given to the current playoff system).
The NRL said it had not planned to review the current system which was invented in 1931 for the Victorian Football League, an Aussie rules competition.
The playoffs begin on September 9, with the NRL Grand Final held on October 2.
- NZPA