In 1902, Mann emigrated to Australia, to see if that country's broader electoral franchise would allow more "drastic modification of capitalism". Settling in Melbourne, he was active in Australian trade unions and became an organiser for the Australian Labor Party. However, he grew disillusioned with the party, believing it was being corrupted by the nature of government and concerned only with winning elections. He felt that the federal Labour MPs were unable and unwilling to change society, and their prominence within the movement was stifling and over-shadowing organised labour. He resigned from the ALP and founded the Victorian Socialist Party.