The federal government has announced a shake-up of Australia's migration system, with visa-hoppers, overstayers, students, and backpackers targeted in the crackdown.

Home Affairs Minister Tony Burke unveiled the changes during a National Press Club address on Thursday , following weeks of delay, heated debate and speculation.

Burke began his speech by highlighting the contribution of migration to Australia, but acknowledging there were problems with the current policy settings.

Read the full story at SBS News - Australia.