Commissioner Angela Jackson also said it was ‘disappointing’ that Anthony Albanese had ruled out changes to Western Australia’s GST arrangementsFollow our Australia news live blog for latest updatesGet our breaking news email, free app or daily news podcastThe Productivity Commission has condemned attacks on its integrity as “unacceptable” after its scathing assessment of Western Australia’s sweetheart GST deal as a costly mistake sparked a fierce political backlash and name-calling.