New South Wales Treasurer Dominic Perrottet says Mark McGowan is the "Gollum of Australian politics".
“You can just picture him over there in his cave with his little precious - the GST,” Mr Perrottet told Sky News Australia.
“The reality in WA is they’ve got a very volatile economy.
“What struck me about yesterday’s budget in WA is a substantial surplus but no reform there to protect those monies into the future when there is a downturn.”
