Dame Beverley, who did not want to comment on Hager's book, said issues before the Office of the Ombudsman raised concerns about the capacity to handle requests and policies used by departments, rather than any alleged rorting of the system. "I haven't observed anything sinister.
"I have observed unnecessary steps and referrals upwards. I have heard of at least five layers of approval before something can be released. That's absurd."
She said the unnecessary upwards delays included referrals to ministers for approval to release information. There were also offices which had "delayed things beyond what is reasonable" while others did "incredibly well".
"There's actually fundamentally nothing wrong with the Act. What is wrong is the execution.
"It is people's understanding of the act and understanding of how to use it." She said many public service staff with expertise in the Act had been "rinsed" out of the system. She said there was an impact on staff with experience "if there's not very many of them left doing this" and they received a heavy load of requests each day.
Dame Beverley -- a former Radio NZ chief executive -- pointed to the public service sinking lid, saying "there's only so much blood out of a stone".
She said the office, which had previously told select committees it was cash-strapped, was "approaching having enough money".
In the past two years, she said extra resources had gone into training for public service staff with positive effect.
Dame Beverley, who is president of the International Ombudsman Institute, said she had been tempted to publish a league table of best-to-worst agencies, as other bodies did abroad.
"We haven't resorted to that in New Zealand but each day that goes by it becomes more tempting." She said the framework of the inquiry had been completed and it would be launched in the next few months.