The briefing papers say that students from India, in particular, show a higher rate of transition from student visa to permanent residency, "suggesting that students from some markets may be more driven by migration prospects than education quality when choosing to study in New Zealand".
In 2016/17, 18,266 were granted a post-study visa. The papers say that closing the "back door" would affect between 9000 and 12,000 students.
Immigration Minister Iain Lees-Galloway has said that he wants to prioritise matching migrant skills to the appropriate regions, cracking down migrant exploitation, and closing the "back door" path to residency.
Officials added that international students who focus on residency rather than study are more open to potential exploitation from an employer.
"This is leaving them open to accepting arrangements to buy job offers, and thus become a party to immigration fraud, in order to gain residence."
The briefing also says the growth in international student numbers potentially pushed out New Zealand workers and suppressed wages, but there was limited data to show the extent of this.