Chief financial officer Melanie Kleyn told senators the spending largely reflected catering and travel support.
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The issue resurfaced during Senate estimates, where executives detailed the scale of the problem.
Hugh Marks: 'Any discussion about Australia’s long-term success must include the ABC.'
'‘Downfall’ is powerful journalism of the highest standard. The ABC is proud of it.'
The order comes after the unlawful termination of her radio contract.