His travels brought him into contact with many people sympathetic with the cause of Aboriginal rights. Although Unaipon was much in demand as a public speaker, he was also often refused accommodation and hospitality due to his race. He gradually became well-known in public life as a spokesman for Aboriginal Australians. Between 1928 and 1929, he helped as a researcher and witness for the Bleakley Inquiry into Aboriginal welfare. In 1934, he lobbied the federal government to take over responsibility for Aborigines from its constituent states.