Parliament won't return until August as the Morrison government tries to limit sitting weeks during the coronavirus pandemic.
Labor and the Greens failed in an attempt to have parliament return earlier, saying the economic packages that passed on Monday would need tweaking.
"The idea that the government has just perfectly nailed very aspect of this $66 billion of new spending is absurd," Labor shadow treasurer Jim Chalmers told parliament.
He said the opposition would need to scrutinise any new spending.
Parliament sat with drastically reduced numbers on Monday to quickly pass the multi-billion economic stimulus and support package.
But politicians won't stay in Canberra for the rest of the week, which was to be the last sitting scheduled before the May budget before the virus struck.
Now the revised calendar won't see politicians return until 11 August.
The budget has been pushed back to 6 October with the concession that things are moving so quickly, predictions about the state of the nation's finances over the next four years in May would be worthless.
Greens leader Adam Bandt told parliament because the impacts of coronavirus had been so unprecedented, it was likely more major action would need to be taken by the government.
"We need the capacity to work out whether more changes will need to be made," Mr Bandt said.
He said he'd already been able to identify a number of areas the government had left people behind, pointing to how people on a disability pension, carers or students wouldn't see any of the economic relief.
Earlier on Monday, Labor leader Anthony Albanese said he wanted the five weeks of sittings scheduled for May and June to stay on the books.
"I am of the view that parliament continuing to function as much as possible even in restricted forms is important," Mr Albanese told reporters.
"There is work for us to do and as the national representatives, we should have input and not just leave it to the executive government."
Prime Minister Scott Morrison said on Sunday the plan was to move to an "emergency-mode operation" while ensuring measures taken were consistent with a parliamentary democracy.
Mr Bandt said politicians had the wit to come up with alternative measures if it wasn't safe for parliament to sit.
Mr Albanese said it was important that getting through the crisis as a functioning democracy not only happened, but was seen to be happening.