"If people are falling through the cracks because they are too scared to reapply under the new annual test, that is no cause for celebration," said the party's work and income spokeswoman Catherine Delahunty.
"We need to ask what is happening to these people. It is no use celebrating that they are off the benefit if they are slipping through the cracks and ending up homeless, sick, or in the criminal justice system."
In Parliament, Labour's welfare spokeswoman Annette King asked Ms Bennett why she was claiming success when the number of people on the DPB had reached a 10-year high and the cost to taxpayers had increased by nearly $200 million since she became minister.
"Because there has been a thing called the global recession," Ms Bennett replied.
"Things have been a little bit tough in the last three years."
The Beneficiary Advocacy Federation said Work and Income staff weren't helping people find jobs.
"These figures show that in fact this proactive engagement is not happening and what is happening instead is that beneficiaries are being demonised and accused of fraud," said spokeswoman Kay Brereton.
"People with very limited employment prospects due to literacy, criminal convictions, language and other barriers are being failed at reapplication because they don't have the skills and the paperwork to satisfy the case manager that they have been actively seeking work."
- NZPA