"I don't think that every child actually needs to be in early childhood education, but I do think it benefits those that are most vulnerable so much, that that's why I'm doing this."
She agreed the reforms would force beneficiaries to enrol their children.
"It is an expectation for all beneficiaries, however we will only be dealing with those whom we class as vulnerable."
Ms Bennett said there were about 220,000 children with parents on benefits, about 31,500 of whom were aged three and four. Only some would be tested - about 20,000 to 25,000 children a year.
"The others we expect them to, but we won't be checking up to see if they have."
Ms Bennett said some parents were not aware of the value of early childhood education, were unsure how to access it or believed there were barriers.
There would be "very clear expectations" that the Government wanted them to enrol their children.
"But we will work with them really intensively, one-on-one case management, we'll only be dealing with those that we deem to be most vulnerable. It's really about support and encouragement - the sanction is very much at the end of what will be a long and intense process."
Ms Bennett said there had to be a "stick at the end" to get behavioural change.
"There is a stick at the end of it. Look, I have looked at this upside down, inside out, read all of the evidence, taken the best advice I can. The reality is, for a percentage of our population, their children are not achieving and getting the kinds of opportunities that they should have in life."
Ms Bennett said people who could not access early childhood education would not be sanctioned.
"If they can't attend early childhood eduction, they will not be punished."
If parents point blank refused to send their children to early childhood education, then there were bigger problems.
"So it is an absolute last resort and the reality is, without a sanction, you aren't using that kind of lever to get the kind of behavioural change that we're looking for, for those children."
