The first inquiry into the deadly Lindt Cafe siege will be released on Sunday, with its findings to shape Prime Minister Tony Abbott's address on national security this week.
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Mr Abbott will join Premier Mike Baird to launch the joint Commonwealth – state investigation into the Martin Place terror tragedy in December.
It is expected to recommend changes to welfare and legal procedures and call for tighter immigration procedures after siege gunman Man Haron Monis was granted refugee status, existed for years on welfare and managed to remain outside jail despite facing a string of criminal charges against him.
But the joint inquiry, authored by Michael Thawley, head of the Department of Prime Minister and Cabinet, and Blair Comley, head of the Premier's department, is not expected to identify any systemic failure by public agencies.
The inquiry report will be expanded upon by Mr Abbott when he addresses the House of Representatives on Monday.
He has already signalled an intention to get tough on potential terrorists playing society "for mugs".
"For too long, we have given those who might be a threat to our country, the benefit of the doubt," he said last week.
On Saturday, Mr Abbott took aim at the 57 jihadists who have left Australia to take arms for Islamic State in Iraq and Syria – 55 of whom were recipients of the dole or disability benefits.
This is not good enough. If you are fit enough to go overseas to fight for a terrorist organisation, surely you should not be abusing the welfare system back in Australia," he said.
"For too long, we have given people who don't have this country's interests at heart, the benefit of the doubt."
In an opinion piece for News Ltd, Mr Abbott wrote: "Rightly, Australians will be angry that their hard-earned taxes have been supporting people who are identifying themselves as bloodthirsty killers."
"Australians don't like being played and they recognise that, along with the enormous privilege of belonging to our great nation, with all its benefits, come obligations. This is why my government legislated last year to ensure that welfare payments to people who are assessed by ASIO to be a threat to security can be promptly terminated." On Monday, Mr Abbott is expected to outline plans to join other countries like Britain, France and Canada in stripping citizenship from dual nationals engaging in terrorism.
He will also urge Labor to support the government's legislation that will require telecommunications companies to store customer metadata for at least two years.
Under the government's proposal, phone and internet firms would be forced to store details such as the time and place of phone calls, and the origin and destination of emails. It does not include the content of communications.
