Australia coach Eddie Jones wants rugby union to adopt a rugby league-style "interchange" system to prevent interruptions by injury stoppages.
Jones believes too much time is wasted with injury stoppages
Jones, who defied expectations to lead the Wallabies to the World Cup final, advocated allowing 12 rolling substitutions and also called for an end to players feigning injury.
"Every time there was an injury the game stopped and that is something that desperately needs to be attended to in rugby," said Jones.
"If you look at all the positives of the game we've had in the World Cup, the negative is that we still have long stoppages for injury.
"My argument would be that we should have 12 interchanges and if people feign injury than you use up one of your interchanges."
Jones also called for the sport's governing body, the International Rugby Board (IRB), to offer more assistance to the weaker nations in order to develop a more competitive global sport.
Australia's 143-0 demolition of Namibia in the group stages was the worst of several emphatic thrashings for the smaller nations, prompting Jones to cite the example of South Korea's journey to football's World Cup finals.
"Why did Korea reach the semi-finals after years in the doldrums?," he said.
"Because they gained experience by playing top European teams. Their success was remarkable.
"The IRB needs to put some more money into developing sides that finished outside the quarter-finals so they can step up and make a genuine challenge for a last eight place.
"There is no point in the teams that were just outside the quarter-finals here carrying on playing each other if they want to improve.
"They have to play top sides - like ourselves - more regularly."