WA Police have ramped up their industrial action against the state government over a bitter pay dispute, hitting the government where it hurts, its hip pocket.

Police officers from Tuesday will begin issuing cautions instead of infringements for minor traffic and liquor offences and will interfere with speed camera locations.

WA Police have stepped up their industrial action against the state government over a bitter pay dispute. Credit:Paul Rovere

WA Police Union president George Tilbury said the industrial action was in response to the McGowan government abandoning its promise of a 1.5 per cent pay increase for police officers.

Instead, officers were offered - and overwhelmingly rejected - a $1,000 per year state wages policy offer.