When the noise level rises around an international trade negotiation it can be a sign of progress. A 12th round of talks in the United States this week on a proposed Trans Pacific Partnership has been accompanied by some alarmed comment in this country and no doubt others.
Critics here, 100 of them, have put their names to an open letter warning that the TPP might enable foreign investors to sue governments that break the terms of the treaty. The 100 include a retired judge, a number of Green MPs and legal academics such as Auckland University professor Jane Kelsey, who follows trade negotiations closely and raised the alarm.
One signatory, former British Labour MP Bryan Gould, summarised their concern in the Herald on Wednesday. "It is," he wrote, "the prospect that our Government is about to trade away - in secret - an important part of our powers of self-government."
He feared a future government could be "stopped" from doing things it was elected to do on issues such as the environment, health and safety and many other policies under threat of a crippling law suit from foreign companies "given far more extensive rights against our government than any New Zealand company would ever have".
The Australian Government appears to share their concern. But it is not unusual, or unreasonable, for any commercial investor to have a claim on a state when a change of public policy undermines the value of its investment. The only difference under the TPP would appear to be that the investor could appeal to an international arbitrator, not the New Zealand courts. This might explain the number of lawyers who have signed Professor Kelsey's letter.