ACT leader David Seymour has announced the party's law and order policy.
Last month the party pledged to make changes to judges' sentencing principles, including removing all consideration of a convict's cultural background, if elected.
ACT says it would ensure tougher sentences for serious crimes, increase the capacity of the prison system and put victims back in the centre of the justice system.
The party's law and order policy released on Wednesday promised to disqualify gang members from holding a firearms licence, and impose tougher sentences for crimes on vulnerable workers.
Seymour said the policy aimed to restore balance to a system that was too focused on criminals instead of victims.
"A compassionate government looks to protect those who might find themselves to be victims first, and then aims to rehabilitate offenders. That is what ACT is proposing.
"ACT believes protecting the safety and property of New Zealanders is the government's first and most important job."
ACT's law and order policy:
Seymour told a media briefing "more people should be in prison", adding that he wants to see the prison population return to the level of 2017 before Labour embarked on its policy of reducing the number of prisoners.
"Our attitude is that the only person responsible for the crime is the person carrying out the crime," he said, saying other external factors such as poverty and mental health should not be used as excuses.
When those reasons were put forward they only encouraged bad behaviour, Seymour said.
"I think it's a mistake to say offending can be justified by the circumstances," he said, adding that letting more people out of prison has not been successful.
He said it was not useful to look overseas such as to the US and Scandinavia because there were many factors within countries that needed to be considered and they mightn't apply in New Zealand when it came to law and order.
Seymour defended his party's plan to spend $1 billion adding 500 places to the country's prisons.
He said the policy includes measures that will help rehabilitate prisoners.
"If you want early release, leaen to read, get a driver's licence and get started on a trade.
"If you can show that you've made that progress then suddenly you change the whole culture of prisons towards prisons being places of self-improvement, being primary schools of basic literacy and life skills instead of universities for crime."
He was insistent 17-year-olds should go back into the adult justice system.
"If an offender is old enough to steal a car and drive it through a dairy they're old enough to wear an ankle bracelet that can be used to ensure they don't break curfew and go off to commit more crimes."
Younger offenders will be sent to a youth justice facility separate from adults but run by Corrections instead of Oranga Tamariki.
They wouldn't have cellphones or KFC "and it won't be easy to escape".
They should also suffer immediate consequences after committing crimes. A police officer should be able to tell the offender to clean up their damage at the scene of a crime and apologise to the business owner, he said.
Seymour said his party's policies swing the justice system in favour of victims.
Before the briefing he spent time with a dairy owner whose dairy was ram-raided in April. The premises suffered $50,000 in damage, his insurance premiums have doubled and he was fearful the fog cannon he had installed would not be activated in time if he was attacked again.
Dairy owners watch David Seymour's law and order policy announcement. Photo: RNZ / Calvin Samuel
Recent polls suggest National and ACT could form a government together, but National might also have to rely on NZ First - who ACT has ruled out.
ACT has floated the possibility of a new kind of governing arrangement if National refused to cooperate during post-election negotiations - a confidence-only deal, which would require the larger party to seek ACT's backing for all government spending - or "supply" - decisions on a case-by-case basis.
National is downplaying the prospect of entering into a confidence-only governing arrangement and has also begun ruling out - or in some cases merely rejecting - ACT policies.
ACT released its housing policy on Sunday which promised to allow builders to opt out of council building consents, scrap the reformed Resource Management Act and use building insurance as an alternative to building consent authorities.
https://www.rnz.co.nz/news/political/497885/act-leader-david-seymour-promises-tougher-sentences-for-serious-crimes-in-law-and-order-policy