Andrea Sharam, who co-presented a report into the supply of home and community care (HACC) workers, said Casey may lose its "current advantage" in the availability of aged care workers in the next 10 years.

"Declining housing affordability in Casey could, as it is doing in the inner and middle suburbs, push these low-paid workers further out.

"Higher rents and larger mortgages require better-paid jobs and hence demographic changes may result in Casey losing its current advantage in the supply of aged-care workers."

The amount of affordable rental housing has plummeted in Casey from a peak of nearly 80per cent in 2005 to 18per cent in 2009, says the report, titled Ageing population and key workers in health & community workers: the role of housing affordability.

HACC workers living in Casey have followed a similar trend, dropping to fewer than 200 in 2009 from a peak of nearly 800 in 2005.

"While Casey is well supplied with local HACC workers, all local governments and agencies will be competing for a declining pool of workers in years to come," Ms Sharam told the Journal.

"Casey's major issue will be that the number of people requiring care will increase dramatically.

"There will be an issue to the extent to [which] the aged in the outer suburbs will be able to afford aged-care services and the extent to which those local governments will be able to raise rates to provide subsidised services."

City of Casey community care manager Jo Smale said it was important for the council to advocate for increased state and federal funding to meet increasing demands for the HACC service.

A Department of Health spokesman said the State Government was working on a 10-year strategy, Ageing in Victoria - a Policy Framework, to meet the upcoming challenge.