MPs fiddled their expenses as a "displacement activity" because Parliament had become irrelevant and ineffective, according to Speaker John Bercow.
Mr Bercow suggested the 2009 scandal was as much a symptom of decades of decline as "malice or corruption" as he urged action to ensure Westminster kept up with the modern world.
In a speech to the Hansard Society, Mr Bercow said that after he became Speaker in June 2009 he feared for the future of parliament."The blunt truth is that the expenses debacle was a particularly embarrassing layer of icing on an especially unappetising cake.
"The reality in 2009 is that the House of Commons as a meaningful political institution, an effective legislature, had been in decline for some decades."
Mr Bercow said the Commons had become, "little more than a cross between a rubber stamp and a talking shop", which:
"Had taken to collective activity such as the imaginative interpretation of what might be a legitimate expense claim as much as an odd form of displacement activity as out of any shared sense of malice or corruption."
Commons Speaker John Bercow has been accused of behaving like an "arrogant toff" by a motorist who claims he scratched her parked car.
Nathalie Pulford, 42, was dining in London's affluent Chelsea neighbourhood when she claims she spotted Mr Bercow bump her car while maneuvering into a tight space.
Ms Pulford told the Evening Standard she confronted Mr Bercow, who denied he had scratched her car. "It sounds petty but it's the principle. As far as I'm concerned he's a little weasel who should take responsibility," she added.
A spokesman said that Mr Bercow "strongly denies that his car hit this lady's car" and that "if she wants to raise it with her insurer, he would be more than happy to defend himself and explain what happened."
Commons speaker John Bercow's comments on migrant workers has raised questions about his political neutrality. As Speaker, Mr Bercow is expected to stay out of active political debates.
Nigel Farage, the UK Independence Party leader told the Daily Telegraph: "It is outrageous that Mr Bercow is happy to overthrow the wisdom of ages and think it acceptable to comment on matters that are both highly political and deeply contentious.
"He is a disgrace to the office of Speaker. There are very good practical and constitutional reasons why the Speaker is neutral, reasons that he obviously believes are beneath his own august self image.”
Eastern European migrants show more "aptitude and commitment" to work than British people, the Commons Speaker John Bercow has said.
In remarks on a visit to Romania last week, Mr Bercow spoke about the “important wave of immigrants” that have come to Britain in recent years, and praised their work ethic, “ reports The Daily Telegraph.
He said: "I believe things should be controlled and monitored when it comes to migration, any state that wants to protect its own people should do this, but there are also great advantages.
“I want to underline the fact that there has been an important wave of immigrants that came to Great Britain from new member states and in many cases they came with aptitudes and a commitment, an involvement we haven’t always seen in our labour force.”
The Independent Parliamentary Standards Authority (Ipsa) gave assurances last night that it would not publish the full addresses of MPs caught up in the latest expenses allegations.
The watchdog was responding to a letter from the Commons Speaker John Bercow warning that there was a "very real danger" that MPs' residential addresses could be discovered.
Sir Ian Kennedy, the chairman of Ipsa, said the "names of landlords and other suppliers of goods and service" would be disclosed where relevant. He added that all affected MPs had been asked whether they had any concerns about their landlord's details being released.
Ipsa had been due to disclose the material in response to a Freedom of Information request.