NEWS.com.au | Ex-treasury secretary calls GST hike inevitable Business Spectator AAP, with a staff reporter. Former treasury secretary Tony Cole has said future governments will "inevitably" increase the rate and broaden the base of the goods and services tax (GST), as shadow treasurer Joe Hockey argued that reforming the tax isn't as ... All Coalition policies to be submitted to parliamentary budget office, says Joe ... THE NEWS WRAP: Former Treasury secretary warns rise in GST “inevitable” Former Treasury head calls for bigger GST |