Between 2004 and 2008 the household wealth of out-migrants exceeded that of new arrivals by $70 billion, according to John Havens of Boston College.

Go down 'heart-break alley' among some of the migrants and find out just how expansive the Aussie is to his immigrants.

As far as competition for jobs was concerned, it pointed out that the number of vacancies is about the same now as it was seven years ago, since migrants create jobs as well as taking them.