Like most everything else in business, employment in a free economy is about supply and demand. When the economy down, the demand for employees is down also. Most countrys are more concerned about providing jobs for their current citizens than people from other parts of the world, especially those who would have to go through the immigration process to be able to work there.
With that in mind, read Australian immigration policies here:
Answered Sep 28, 2010
Edited Sep 28, 2010