Really? Miranda Devine? I actually lol'd.
Let's clear up a few things. One way to reduce the amount of "irregular maritime arrivals" is to not let the refugee boats reach the shore. That is Liberal Party policy.
You'd have to lived under a rock for years to not know how that works. Let the boats sink with huge loss of life such as SIEV-X with 353 dead. Or maybe lie to the nation about refugees threatening to throw children overboard. Or ignore established maritime law. And so on.
Compared to many other countries Australia has very few asylum seekers* arriving by boat but we still bang them up in what amount to concentration camps.
* I use asylum seekers in the true and legal sense, not the Daily Mail frenzy of racism sense.