Senator O'NEILL (New South Wales) (15:03): I thank the minister for her answer. The minister responsible, Minister Robert, has insisted this fundamental revision would only affect 'a small cohort'. The Department of Human Services staff believe about 600,000 robodebts that have been raised using income averaging will need to be reassessed. Does the minister agree that 600,000 robodebts represents a 'small cohort'?