"I'm just a bit more optimistic," he said, since he doubted New Zealand would return to historic levels of debt accumulation. "The fact is we are in a world that's pretty different because everyone's reducing debt."
Households were saving more, which forecasters had originally doubted would happen, and New Zealand corporate balance sheets were stable. While public debt was growing in part because of borrowing to cover quake rebuild costs and to lean against the impact of the global recession, the government remained committed to a Budget surplus by in the 2014/15 financial year.
If the current account deficit persisted at very high levels, New Zealand would also suffer a "textbook" sharp correction, with a much lower exchange rate among the outcomes.
Green Party leader Russel Norman challenged English on this, asking why the government didn't seek to manage the current account deficit down rather than wait for global financial markets to "punish" New Zealand.
English said he was "unpersuaded" by the range of alternative policy options being put up by Opposition parties, saying all had been debated over the last 30 years and there was no substitute for continuing with economic reforms in areas such as land and water use, and the Resource Management Act, to foster faster economic growth.
"If we thought we could manage it, we would go and manage the damn thing," he said. The high New Zealand dollar was a "signal from the world" that New Zealand had "sound prospects of producing stable yields compared to other countries."
"Our problem is one of success."
The New Zealand economy would remain "patchy" and unpredictable. Growth in the first half of this year had been stronger than forecast, while the second half was turning out to be weaker than anticipated.
"We think doing 2 to 3 per cent annual growth we will continue to get job growth and continue to get household incomes into reasonable shape," English said.