"When you are under monetary pressure you make decisions that in the long run are not the right ones," he said. "This information can mean one or two tries in a game."
But NZRU high performance manager Don Tricker said the decision was based on needs, not cost.
Serrallach believed the new Steve Hansen-led coaching team may not rely upon video analysis as much as former coach Sir Graham Henry did.
Some coaches looked for improvements through analysis, he said, but others preferred to rely on intuition.
Serrallach invented a system of monitoring every player's passes, kicks and tackles for soccer, and later modified the technology for use in rugby.
"This allows us to provide a three-dimensional analysis of the game. They can turn the head of Dan Carter and see what he sees at his right and left. They can figure out whether he has made a high quality decision."
His analysts typically provided detailed statistics by 4am the morning after games.
