The Prime Minister Bill English told Morning Report the new Orangi Tamariki will improve the safety of children and the better framework will put it in a stronger position to ask the Government for more funding.
Oranga Tamariki, the Ministry for Vulnerable Children, has a huge job ahead of it to intervene earlier in families in crisis.
Mr English told Morning Report "some of these children will cost a million dollars by the time they get to age 30. That's a lot of misery."
The Prime Minister also told Morning Report he will be making an announcement shortly on a Defence Force report into an SAS raid on villages in Afghanistan.
A book, Hit & Run, claims six civilians were killed in a raid on two villages in 2010 and the Defence Force subsequently covered that up.
The Defence Force has rebutted details in the book, including the names of the targeted villages.
Bill English says he will be discussing a report from the Force with the Defence Minister, Gerry Brownlee today and hopes to make an announcement in the next few days.
He told Morning Report the timing of a possible inquiry has nothing to do with the election later this year and says "given the fundamental problems with the allegations, there is unlikely to be an inquiry into war crimes."
Watch Bill English interview: