Police want to be able to use smart-phones to access driver licence photographs on the roadside, to stop people they pull over without identification from using false names.
But Police Minister Anne Tolley says it would breach privacy rules.
The debate has started in the wake of a court case involving Waldo Van Niekerk, pulled over in 2007 and 2009 for speeding and drink-driving. He did not have identification and claimed to be someone else. He appeared in court twice under the false name, was convicted, paid fines and was caught out only when the man he claimed to be was himself stopped for drink-driving.
Smart-phones and iPads are to be rolled out to officers next year and Police Association president Greg O'Connor said they should have access to the driver licensing database. The move would not give police access to anything they weren't already entitled to.