Daunting a super-profits style tax on other sectors of the economy, Prime Minister, Kevin Rudd has ruled out his Government.

Future Governments would need to deem taxing companies only on above-normal profits under a parallel system to Labor's planned resource super profits tax, Ken Henry, Treasury Secretary recommended.

The highly-profitable Companies would pay more tax, under such a system, he said.

''The Government will not be adopting that model in Australia. The bottom line is the Government's position in relation to the resource super profits tax is that it applies to non-renewable resources in Australia", the Prime Minister, said.

Dr. Henry had uncovered a secret tax agenda, saying that the Government was planning to eventually expand its new 40% impost to retail, banking, manufacturing, small business and agriculture, the prior opposition had alleged.

If the Government would go ahead and impose its super profits tax on every Company in Australia, it would strike at the heart of the Company's prosperity, the opposition finance spokesman, Andrew Robb said. He further said that it was madness if they would proceed with it.

There was a long list of Companies, including Telstra, Woolworths, Coca-Cola Amatil and Fosters, doing better than the mining industry, Opposition treasury spokesman, Joe Hockey said.

Mr. Rudd however welcomed the statement as an opening to talk about share prices in general, noting that most mining shares had in fact gone up since the Government announced details for the tax on May 2.