Defence--$500M short in facilities management

Facilities management is part of the job of the Defence bureaucracy. So why are we finding out that they claim to be $500M short in this area over the next three years?

"The Australian Defence Force faces a $500 million shortfall in the funds needed to maintain its extensive array of bases, training areas and buildings over the next three years."

There is money out there to be had to fix this. Simply because there are Defence projects out there that we just do not need. On a whim, Defence just got approval of $500M for a C-17 that was never before mentioned as a need.

Who in the Defence bureaucracy is not doing their job?