Science and Innovation Minister Dr Megan Wood said she became aware of the agency's entertainment bill shortly after becoming a minister.
"While there is a place for entertainment, especially when completing commercial deals, I made clear to Callaghan the level of internal spending was not up to the standards I expected," she said.
"Callaghan has assured me they take that seriously, and have assured me that they have changed their policy so that this won't happen again."
Callaghan said, in a statement, the total spending was "not unreasonable for a client-facing organisation of our size", but there were a few cases of spending that were "not appropriate".
"Since then we have tightened relevant policies to ensure work-related spending by staff is modest and appropriate for the public sector," it said.
The organisation was looking to publicly publish its spending in the future to provide greater transparency, it said.
- NZN