Documents are revealing the state-owned company implementing the National Broadband Network paid its staff and executives tens of millions in personal bonuses last year.
The NBN Co paid its 6000 staff and executives $77 million in bonuses from July to December last year with taxpayer money, including $4.3 million for top executives.
It is a massive increase from the previous financial year's bonus payments which reached just over $43 million.
A Senate estimates committee is waiting for over thirty questions to be answered by NBN Co - many of which are overdue by nearly two months.