Latham scores one of his five tries (Getty Images).

Australia coach Eddie Jones has struck out at critics citing disharmony in the Wallabies squad - claiming the 142-0 demolition of Namibia instead showed a group of players eager to retain the World Cup.

"The guys who haven't played before played with great spirit, played with the spirit of guys who know they are in the squad and know they are competing for spots," said Jones.

"There have been these stories this week about disharmony and discontent, and as host country we're open to scrutiny - which is fair enough," he said.

"You don't play in the coherent, direct and fluent style like that if you've got disharmony.

"We've got a squad of 30 and at any time we're going to have 15 happy blokes, seven blokes who don't know whether they're happy or not on the bench and eight blokes who are unhappy.

"If we haven't got eight blokes who are unhappy then we've got the wrong people in the squad.

"We've got some really tight selection decisions between very good players, and that was our aim.

"We'll have unhappy guys again next week - but what we haven't got is disharmony.

"There is a big difference between unhappiness and disharmony."

There was certainly some sweet harmony in the Australian backline as the scoreboard whirred over with frightening speed.

Among the records broken were the highest-winning margin in World Cup history, as well as individual Australian Test bests of five tries by full-back Chris Latham and 42 points by winger Mat Rogers.

Even so Latham insists his record is not as important as the quality of the performance.

"It's more of a pleasing thing from the team perspective in the way we held our structure," said Latham, who overtook the four-try mark previously held jointly by him, David Campese, Jason Little and Greg Cornelsen.

Jones was pleased with the impact provided by his two debutants Matt Dunning and John Roe. Dunning started at loosehead prop in place of regular number one Bill Young, while Roe came on at half-time for David Lyons.

"We were very pleased with both of those guys," said Jones.

"Matt Dunning showed what he has been showing at training. People will say he wasn't as prominent as he has been in Super 12 - but for us he was very good.

"He cleaned out, did a couple of good tackles and did the tough stuff. To play loosehead prop you've got to do the tough stuff, and that's what he's starting to do.

"Johnny Roe came on in the second half and showed that he's going to be a very handy number eight with some good leg drives and some good tackles."

Matt Giteau, who produced a superb performance at fly-half to set up those outside him and also scored a hat-trick himself, was pleased with his own efforts in his first Test start.

"It's done a lot for my confidence," said the 20-year-old ACT Brumbies utility back.

"You've got to be happy starting rather than playing a little bit here and there, so that whole game will help my confidence a lot," he said.

"It helped my calling and to be able to play more of a leading role during the game."

Namibia coach Dave Waterston was quite frank about the thrashing his team had taken.

"They were too big, too quick, too fast - and it was a case of boys against men," he said.

"It just shows really the gap between top sides and the sides of the lower echelon - but to be brutal the Australians approached it like a training run.

"A coach is normally an optimist. But at half-time I was going to go into Eddie Jones' office and ask him if he had any ideas on how to play the second half.

Namibia prop Neil du Toit insisted the match had presented him and his team-mates with a huge opportunity.

"The experience we got there is irreplaceable," said the 34-year-old.

"Yes, it's true we got a big hiding. But you actually physically feel that you can measure yourself against these guys and know where you have to go."