(Hmmm... there's an implicit assumption in the statement above that Null Device readers live in inner-city Latté-Socialist Elite electorates with Labor MPs. If you live among the Silent Majority Of Suburban Battlers in the Tory electorates, there's still a reason to write your MP; at the very least, it may result in some uncomfortable questions being raised. If you live out in the bush where the Nationals hold court, even better, with the farmers having gotten the rough end of the pineapple and all that.)
You can find your MP's contact details here; to find out which electorate you are in, go here.