WA is in the middle of a grey crime wave with the number of baby boomers fronting magistrate's courts rising more than 50 per cent in six years.
Demographer Bernard Salt said half the increase was because of the ageing population but he believes the other half is because baby boomers are more likely to "bend the rules" to satisfy their sense of entitlement.
He believes that many are turning to crime so they can retire in the manner to which they have become accustomed, especially during periods such as the "greed is good era", which the generation championed in the 1980s.
The Australian Bureau of Statistics figures show baby boomers are the fastest-growing cohort facing WA magistrate's courts, with appearances by those aged 55 and older increasing 56.6 per cent from 2005-06 to 2011-12.
The magistrate's courts cover 95 per cent of cases, including drug and alcohol charges, theft, fraud and sex offences.
The 50-54 age group also rose 56 per cent, and the 45-49 age group rose 49 per cent.
Mr Salt said people were motivated to commit crime because of dwindling resources in their retirement years, as well as a sense of being left behind in society.
"Some people find themselves at 55 years of age and feel like the party's over," he said.
"They may not be able to get a job, they may feel disenfranchised. They think, I want it and I'm going to get it."
Mr Salt said baby boomers, born between 1946 and 1965, had a greater sense of being entitled to material comforts than their predecessors.
Crime researcher David Indermaur said the statistics showed that efforts to curb crime in younger groups had been successful, with a 20 per cent fall in those under 20 facing the court.
Most age brackets in the 20s and 30s had relatively minimal increases. He believes it may be older people who now need programs to get on the right track and not to feel disenfranchised.
"You could say some older people are falling by the wayside," he said.
Murdoch University Associate Professor Guy Hall said advances in DNA technology could be behind the increase, with some fronting court for crimes committed long ago.
The grey crime wave has also been noted in other parts of the world, including Britain, Japan, France and Israel.The ABS does not reveal which crimes are most commonly committed by baby boomers, but criminologist James McCue speculated they involved driving and vehicle offences and sex and drug crimes.