NDP Leader John Nilson says the government needs to justify cutting services while spending $775,000 for new MLAs.
Attorney General Don Morgan says some constituencies are so big people have to travel a couple of hours to see their legislature members.
Morgan also says the government has saved money in areas such as communications and travel, so the new MLA expense is reasonable.
Premier Brad Wall said last December that new constituencies are needed because the province's population is growing.
The change would bring the total number of seats in the legislature to 61.