"Evidence shows that support for beneficiaries to undertake study, such as the Training Incentive Allowance, can be effective in increasing the time participants spend off benefit."
The new approach appears to be a dramatic turnaround from the 2009 Budget, which restricted the TIA to courses at level 3 or below on the national qualifications framework.
South Auckland sole parent Tania Wysocki cited that cut last week as the reason she had to turn to prostitution to cover childcare and travel costs while she studied veterinary nursing. The papers say the Cabinet will make final decisions this month.
In another paper last July, Ms Bennett and Finance Minister Bill English told ministers the investment approach had not been applied to welfare anywhere else in the world, but Australian actuaries Taylor Fry had advised it was "feasible, based on a focus on employment outcomes as the primary measure to control costs".
Ms Bennett said the new system would change "whom we invest in", giving contractors higher pay for helping the costliest beneficiaries such as sole parents into work.
"The flip side could be some will get less money spent on them. There could be people who, if we did very little intervention, would still get jobs by themselves," she said.
She said "fierce discussions" were going on with the Treasury about giving her ministry flexibility to spend more about $130 million a year more now to save money in the future.