Labor is ramping up its attacks against the Morrison government over delays in establishing a national integrity commission.
The opposition has sharpened its focus on calls for an anti-corruption watchdog as federal parliament sits this week.
It has quizzed the coalition about the luxury watch scandal at Australia Post, a Western Sydney Airport land deal and Liberal Party ties to taxpayer-funded contracts.
Labor is also digging for answers about Treasurer Josh Frydenberg's handling of expense claim controversies at the corporate regulator.
"This government is a dumpster fire of ministerial scandal and we're seeing it right across the board," shadow treasurer Jim Chalmers said on Tuesday.
"That's why we need a national integrity commission and it's probably why the government is dragging its feet on it."
Opposition Leader Anthony Albanese pursued the government about integrity issues again in Question Time.
Mr Albanese asked why tens of thousands of dollars had been spent subsidising the use of personal jets by Crown Casino, Clive Palmer's Mineralogy and Leppington Pastoral Company during the pandemic.
"As Australia hurtles towards $1 trillion of Liberal and National Party debt, why on earth is the deputy prime minister spending borrowed money on these luxury flights?"
Michael McCormack said $2.7 billion in assistance had been spread across the entire aviation sector.
Mr McCormack said the government had given 70 operators rebates to ensure more than 400 return flights took place each week.
"This has actually kept those regional communities, indeed kept the people in them, with the ability to fly around the nation," the deputy prime minister said.
"This is so important and I am proud of the aviation assistance we have provided."
Prime Minister Scott Morrison has accused Labor of slinging mud and urged the opposition to join him in focusing on the coronavirus economic recovery.
Australian Associated Press