The Prime Minister's open to axing entire Government agencies, saying there's probably too many. 

Public Service Commissioner Sir Brian Roche says he's considering the idea of cutting whole departments and bringing others together. 

Christopher Luxon told Mike Hosking he wants more efficiency in the public sector and is open to departments being scrapped. 

He says there are many small agencies that lack scale, and they need to be better focused on core business. 

Luxon also says New Zealand needs to do more to keep on top of illegal immigration.  

Associate Immigration Minister Chris Penk is considering the case of Kiwi born 18-year-old Damen Kumar. 

Kumar's parents have been living as overstayers for 24 years.  

Luxon says he can't comment on the individual case, but he told Hosking people need to follow the immigration process.  

He says illegal immigration is unfair for people who have followed the rules. 

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