Christchurch Labour MP Ruth Dyson says many of the submissions on proposed electorate boundary changes don't represent what the public wants.
The Representation Commission has received 409 objections to the proposals for the next two general elections from about 1700 people.
Electorates that have generated the most comment include Mt Roskill in Auckland, where most of the 128 objections oppose an area currently within the existing Epsom electorate moving into the Mt Roskill electorate.
In Christchurch, where post-earthquake population shifts have altered the voting landscape, objectors oppose the Halswell area moving from the existing Selwyn electorate to the Port Hills.
The MP for the Port Hills, Ms Dyson, is criticising submissions she says are clearly politically motivated.
She says keeping communities of interest together should be driving the changes, rather than consolidating voters.
The Representation Commission plans to hold public hearings between 10 and 19 February and the final boundaries will be made public on 17 April.