Simon Upton says his proposed approach to monitoring spending applies to all governments.
But survey was finished by August last year, before rising inflation started to bite.
The Treasury expects operating deficit for 2021-22 year will now be lower than forecast in May Budget.
Competition and supplies expected to increase as a result of taskforce work.
Will it be harder to get good access for meat and dairy exports in future trade agreements?
Deal expected to be worth an extra $1.8b a year to New Zealand but €4.5b to the EU.
National's Melissa Lee asks: 'Can NZ businesses be confident the Govt is doing everything possible to stop cyber attacks?'
'What are the Europeans prepared to offer and what will our government be prepared to accept?'
Light rail is the preferred option but Government will also consider a rapid bus network.
Chris Penk: Electoral law should not be changed for the sake of partisan interests.