Opposition parties say ACC's new service agreement with the Government is "window dressing" but the corporation's new boss says she's taking it seriously.
The agreement was released on Thursday and sets the top priority as rebuilding public confidence in the scheme.
ACC Minister Judith Collins says she's "rebalancing" its responsibilities after the turmoil over a huge privacy breach and opposition attacks over the way it has "exited" thousands of long-term claimants over the last three years.
Its chairman, chief executive and three board members have resigned in the last two weeks.
Paula Rebstock, appointed as interim chairwoman, says ACC's "major responsibility" is to support people with injuries and rehabilitate them.
The previous service agreement, signed by Ms Collins' predecessor Nick Smith, put financial management at the top of the list.
"We do need to build trust and confidence in the scheme and we have to remember what our main task is," Ms Rebstock said on Radio New Zealand on Friday.
"We also have to manage our costs, because ACC has to be sustainable."
Ms Rebstock confirmed case managers' pay would continue to be assessed partly on the basis of how many people they rehabilitated.
That's a big issue with opposition parties who say it amounts to bonus payments for staff who manage to cut claimants' entitlements or get them off compensation altogether.
"We have to assess the performance of people whose job it is to rehabilitate people so we know how well they are doing that," she said.
NZN