Migration: Do prosperous nations have a moral right to exclude? - The Minefield - ABC Radio National (Australian Broadcasting Corporation)

Increasingly, prosperous states like Australia are seeking to limit their migrant intake.  When do states have a right to exclude migrants in need? Is there a case for 'open borders'?

http://www.abc.net.au/radionational/programs/theminefield/migration:-do-prosperous-nations-have-a-moral-right-to-exclude/10003708