Ms Pearson said a sentence of community work coupled with supervision would be a deterrent sentence.
However, Ministry of Social Development prosecutor Anitesh Govind said the offending warranted a heavier sentence than community work.
Benefit fraud was not as "easily detected as one would suggest", he said.
"It was her duty to advise the ministry of any changes in her circumstances. This is taxpayers' money. The victims are the community," he said.
Laris has been paying back $20 a week from her single parent benefit since April.
At that rate it would take until 2023 to repay the debt, Mr Govind said. Laris had worked at four separate places while collecting a sickness benefit between September 2008 and December 2012, wrongfully collecting $19,499.80 in benefit payments.
Judge Morris said if she ordered the maximum hours of community work, Laris would affectively be paid $100 an hour for her fraud.
The amount of money involved was serious and at the least an electronically monitored sentence was warranted, the judge said.
"She is at greater peril."
The judge ordered another pre-sentence report be completed to assist the court at sentencing on November 13.