It was a messy affair and resulted in a reorganisation of state Māori agencies, but at the time, a 1987 TVNZ programme claimed a link between the loan scandal and CIA agents in Hawaii.
It carried echoes of an eerily similar episode in Australia from a decade earlier.
When Gough Whitlam became Australia's Labor Prime Minister, in 1972, he abolished nuclear testing, shifted the country away from its close relationship with the United States and questioned the purpose of the US-Oz spy base at Pine Gap, near Alice Springs.
The CIA considered Whitlam a threat to Australia's national security.
In late-1974, a finance broker with CIA connections talked two Labor MPs into signing up to a US$4 billion loan, from unofficial sources, to enable the government to buy back the country's mineral resources.
Loan arrangements then stalled, details of the loan became public, a constitutional crisis grew and the Whitlam government lost the 1975 election.
Some say the New Zealand loan scandal was a set-up from the same CIA playbook — an attempt to destabilise a democratically elected government because it did not conform to the US vision of the world.
The 1987 TV programme's allegations of CIA involvement were repeated and elaborated by a Peace Movement Aotearoa article printed later the same year.
More details have since been added, as recently as September this year — in a Covert Action magazine article co-authored by Murray Horton, organiser of the Campaign Against Foreign Control of Aotearoa (CAFCA), and a US-based researcher.
The article quotes a piece Bill Ralston wrote for the Listener in 2008, in which he says much of the loans affair information emanated "from a man subsequently identified as the head of the CIA headquarters in Hawaii [Eugene Welsch], who was operating under a commercial cover as a businessman".
Several of the businessmen who floated the loan worked for a CIA-front company called Bishop, Baldwin, Rewald, Dillingham & Wong — which acted on the instruction of Welsch, Horton writes.
The Weekend Mix asked Andrew Little, the Minister responsible for the GCSB and NZSIS, what he thought the spy scandal said about the value or danger of spy agencies.
"I think the CIA, and the history of the CIA, is its own thing — that is, the way the US conducts some of its foreign relations," Little said.
"But I think you can be assured, in a country of our size and nature, our security intelligence agencies aren't involved in toppling sovereign governments.
"They are involved in gathering information that is relevant to our security interests, our economic interests and protecting New Zealand."
Indeed, with friends like those, who needs to make enemies.
