Bush said by focusing on proceeds, they deprive criminals of their assets and influence.
"These efforts are about protecting vulnerable people, removing the incentive to join gangs in the first place, and keeping the wider community safe," he said.
"The vast majority of New Zealanders are rewarded through honest labour but then there are those who seek to gain from victimising and hurting others, and those are the ones we target."
$1.6 million property seized for cannabis growing
In early January, the search of a Feilding property revealed a sophisticated cannabis cultivation operation with more than 1100 cannabis plants, police say.
Two people were arrested and the property, valued at $1.6m, was restrained along with $840,000 cash, vehicles and farm-related equipment.
This operation, like many others around the country last year, resulted in the recovery of a significant amount of cash.
Detective Inspector Craig Hamilton, officer in charge of the Asset Recovery Unit, said anti-money laundering laws are making it increasingly difficult for offenders to get cash into the banking system.
"It's not unusual to find significant sums hidden under beds or couches, in the lining of walls, or in holes in the ground," Hamilton said.
"The ARU is increasing its capability and capacity with the recent addition of extra staff, and there are more to come."
The 2019 estimated value of restrained assets represents a 65 per cent increase on the 2018 figure of $61m, he said.
"Money derived from the sale of forfeited property is being reinvested across a range of initiatives to support the safety and wellbeing of communities, including drug addiction services.
"This is very rewarding for our staff, who are responding to so much methamphetamine-related crime every day."
He said it was an insidious drug causing serious harm in our communities.
"We urge anyone with information about this type of activity to come forward — the more we know, the more effective we can be at stopping criminals unfairly profiting at the expense of others."
