From an interesting essay by Julian Burnside:
The fact is that boat people do not break any law by coming here the way they do. Over the past 15 years, 90% of them have ultimately been assessed as refugees entitled to our protection. Their arrival rate over the last 12 months has been much higher than the historic average, but even now it represents only four weeks’ ordinary population growth. While an estimated 25,000 boat people arrived in Australia in the 12 months to June 30, 2013, we received 168,685 new permanent migrants and over six million visitors came to our shores in the year ended December 2012. Boat people do not present a demographic problem for Australia.
Spooked by tabloid scare-mongering, both major parties have chosen deterrent policies: treat them harshly, push them off to small, impoverished Pacific neighbours. The low point of this is the recent Coalition promise to bring in the military to deal with the “emergency”.
The spectacular cost of these measures passes without complaint because it is seen as a kind of protection. While it is difficult to separate out the various components of the cost, indefinite detention costs, on average, around A$160,000 per person per year as of 2011-12. The actual cost varies: metropolitan detention is cheapest. It gets more and more expensive as the place of detention is more remote. On current estimates, we will spend about $4 billion each year brutalising people who have committed no offence and have done nothing worse that ask for protection [emphasis mine].
By way of comparison total Australian ODA in 2012 was just over $5.2 billion AUD.