Do you really think most of these people are legitimately in fear of their lives or just the ones wealthy enough to pick the best country in the world to be on welfare?
Their modus operandi would suggest that the latter might be the case.
I have personal experience of working with refugees in the last 12 months so I can speak from experience on this topic. I don't think welfare has anything to do with the selection of Australia for most (but not all as I'll explain in a moment).
People like Somalis and Afghanis can tell you horrible stories of escaping persecution or war and waiting for years in refugee camps for resettlement. Boat people on the other hand have usually paid $20,000+ to get here so either they or their families have money to begin with and yes, I'm not sure that their situations are as bad. Iranians in particular seem to be seeking a better life rather than fleeing persecution.
I worked a lot with a few Iranian people earlier last year and one lady in particular told me her story. She said that she was quite a wealthy, educated person in Iran but had paid for a place on a boat because she had nieces and a sister in Melbourne and wanted to get out because her family had been in trouble with the political police. She got quite a shock when she arrived here as she had no money and her sister refused to help her - apparently her sister managed to get her money out of Iran but she still refused to help because she had 'problems of her own'. I am fairly sure that Iranians were actively recruited by people smugglers on the promise of "Australia has free housing and free welfare" and then they are totally surprised to find that housing in particular is non-existent or that they must spend most of their dole on rent. Most Iranians I've met are really shocked to find there's no such thing as free government housing and that they have to compete in the private rental market with everyone else; one Iranian I worked with got really aggressive because I think he felt he'd been gypped (too bad).
My issue with this is that we aren't looking after the Australians who are poor, usually mentally ill, and homeless and yet more and more poor people come into Melbourne every day off boats and from refugee camps. You can't deny that it making more hardship for the people we have here who we already can't help because there's (almost) no such thing as public housing any longer, refugees are competing with Aussies for whatever is left. It's manifestly unfair to the disadvantaged people we have here to import more and more disadvantaged, poor people.