Why were more half castes taken more than full blooded aboriginal kids?

More mixed-race Aboriginal children, often referred to as "half-castes," were targeted for removal during Australia's assimilation policies in the 20th century because they were perceived as more closely fitting into white society. Authorities believed that these children could be more easily integrated and educated, thereby promoting the idea of a "whiter" future. This practice was rooted in racist ideologies that aimed to diminish Indigenous cultures and populations. Full-blooded Aboriginal children were often left behind due to prevailing beliefs about their inability to assimilate.