McCafferty denied England's domestic game is a negative influence on its national team, insisting that current club structures provide a sufficient pathway for players to thrive.
"They've got private investment in New Zealand so I'm not sure that's the conclusion you can draw," he said.
"I've always been very clear in my views, I understand the history of why certain countries and certain unions are in a particular place but, if you look at the expansion of the sport, I think the case is pretty clear that you need to attract investment.
"As far as England is concerned - I'm not worried about what Steve Hansen said about France - there are 75% of players playing each weekend who are English qualifying.
That's gone up and it gives a pool of players to every English coach which is pretty unrivalled around the world. We've just got to find the clues and things to unlock the elite level of performance within that.
"So despite Steve Hansen's comments, I think those were a bit misjudged . I think it is just more about the top end, how you translate all of that structure and scale that we have in England into elite outcomes."
The impact of the English club competition on the national team will be part of a review announced into the World Cup campaign failure.
But there is already criticism of the five-man panel named to conduct the review.
England's 2003 World Cup winning players Will Greenwood and Lawrence Dallaglio have questioned the absence of Sir Clive Woodward from the panel which includes two people who approved the appointment of Stuart Lancaster as coach three years ago.
Former Lions coach Sir Ian McGeechan and the (England) RFU chief executive Ian Ritchie both ratified the permanent appointment of Lancaster in 2012. They are on the panel who will rule on his fate along with ex-England lock Ben Kay, the professional game board chairman, Ian Metcalfe, and the former (England) Football Association chief executive Ian Watmore.
Ritchie said there would be extensive input from players and coaches but the findings would be confidential. The contents of England's 2011 World Cup review were the subject of a damaging leak.
Greenwood believes Woodward, the coach in 2003 when the World Cup was won, should have been included.
"The argument is keep your friends close, your enemies closer. Now Clive is not an enemy but he's a ghost. He's a giant spectre that gets thrown into the pot the whole time," Greenwood told the Guardian.
"Clive is the elephant in the room. I'd have him there all day long. From the outside what you see is samey samey. Same group making potentially the same mistakes. If you're asking for people to have a white board and you want a dynamic group of people to come in and go 'right what's wrong, what can we do', Woodward should be in the room."
Dallaglio said that, if Woodward was not under consideration for the England head coach job, he should be involved in the decision-making process.
"Clive is English, has had the job before and has won the World Cup, so surely he must be qualified on how things should be taken forward," said Dallaglio. "But we'll continue to ignore the one person who has actually delivered in this competition. I despair of that a little bit."
