Opposition leaders say New Zealand's involvement in the international "Five Eyes" spying network should be included in an inquiry into intelligence agencies.
Labour leader David Shearer and Green co-leader Russel Norman said too little was known about what benefit New Zealand got out of the relationship.
It also brought from Dr Norman comparisons to New Zealand's rejection of nuclear weapons in the 1980s - a step which saw the country frozen out of friendly relations with the United States for 25 years.
The call comes after a week of international suspicion over spying by the United States' National Security Agency, a sister agency to New Zealand's GCSB in the Five Eyes network. NSA whistleblower Edward Snowden claimed the agency used data from Apple, Facebook, Google, Yahoo and other tech giants to spy on billions of people.