Many times.Appearing before a Senate inquiry this week into gas resources taxes, the former Treasury Secretary and one-time National Australia Bank chairman returned to long familiar territory, urging Australia's elected leaders to stop selling the country short."Just do it, in the national interest, just do it," he said, pausing for effect, "and stop the crap that the Australian public have put up with for decades now in respect of taxation of Australia's finite resources."By week's end, Henry's plea once again had fallen on deaf ears.Prime Minister Anthony Albanese quietly kyboshed calls for a 25 per cent tax on gas exports, at least in the upcoming federal budget, echoing criticism from the gas industry.The windfall profits tax, they have argued, would alienate key buyers such as Japan, Malaysia and South Korea, the very countries now prioritising liquid fuel supplies to Australia.Proponents have dismissed the argument Buyers, they say, would be completely unaffected by the proposed new tax, arguing gas exporters are merely blowing smoke around the key issue.Our tax system, they claim, has failed to deliver the bounty from the nation's riches to the owners, the Australian people.In particular, the Petroleum Resources Rent Tax — once considered world leading tax policy — no longer works as intended, raising only a tiny fraction of the revenue that it should.According to the gas giants, they pay substantial amounts of tax already, around $20 billion a year between them which would be imperilled if they had to pay an export tax.But as Henry points out, all companies pay tax