KiwiSaver had created "considerable costs" for taxpayers, Mr English said. Government had spent $2.6 billion on the kickstart payment alone, and scrapping it would save $125 million a year. These savings would be channelled into "priority public services".
The Government predicted sign-up rates would not be affected.
But the change riled Opposition MPs, who said it was mean-spirited and would affect young people more than others.
Labour's Grant Robertson said it would reduce savings at a time when New Zealanders should be saving more. "We need long-term thinking, not short-term," he said.
Green Party co-leader Metiria Turei said axing the payment was a "nasty move" which saved money by taking it from young New Zealanders.
"Young Kiwis may not have expected to come out ahead after today's Budget," she said, "but few of them would have expected to be robbed of the KiwSaver kickstart other generations got."
The KiwiSaver scheme, which was introduced by the previous Labour Government, has gradually been pared back over several budgets by the National-led Government. The biggest changes came in 2011, when National removed the tax exemption for employer contributions, halved the member tax credit and raised the minimum contribution rates from 2 per cent to 3 per cent.