australia - no vacancies, page-100

"The issue is that Australia has an ageing population which will to varying degrees all demand government financial support (either through medicare refunds, other subsidies and the good old pension.) This is all fine if there are the tax paying workers to pay for all this expenditure but there wont be...unless we increase our population"

this argument is proven to wrong
the cost of new infrastructure plus resettling the extended family eliminates any benefit we might gain from their input
also australia makes its money from resources not manufacturing
new migrants is like increasing the number of shareholders in the company and is just diluting the holding of the original stake holders