more. CURTIS: These are efficiencies essentially that can only be found once.  They might have an ongoing saving but you can't go back and - and when people have cut their air travel to the bone to ask them to cut it further.  Is that a realisation that - that the low hanging fruit has essentially gone and you're going to have to make much more difficult decisions in the future? GRAY: The Government is used to making difficult decisions.  The business of Government is about making difficult decisions.  So we do know the efficiency dividend did its work, it's isolated a range of areas where we believe further attention can be applied, and savings taken. CURTIS: And that efficiency dividend will be ongoing? GRAY: The efficiency dividend has done a great job for public sector management.  What happens for the future of the efficiency dividend is an announcement for the Finance Minister  to make and an announcement for the Treasurer to make. That isn't my job. My job is to implement as effectively and as fairly as I can the efficiency dividend which is what we have been doing.