Former Queensland assistant health minister Chris Davis says he was sacked this week partly because he stood on some powerful toes.

Premier Campbell Newman dismissed Dr Davis after he spoke out against doctor contracts and changes to the Crime and Misconduct Commission.

Mr Newman described Dr Davis as a man of great integrity, but said he had to be dismissed because he breached Cabinet solidarity.

However, Dr Davis has told 7.30 Queensland that he had also raised concerns with the Premier about looming changes to political donation laws, which is partly why he was sacked.

A spokesman for the Premier says Dr Davis never raised any concerns about electoral donation laws with either himself or the Attorney-General, and any claim that he did is completely wrong.

But Dr Davis says he suspects a number of complaints were made about him.

He says revelations at a New South Wales corruption inquiry show powerful interests are involved in politics.

"You only need to look across the border to New South Wales to actually see under current arrangements how there are a number of very powerful interests in any political system," he said.

"We have at the moment on the table a great relaxation of caps and donations and so on, just at the same time the new Premier of New South Wales Mike Baird is actually saying that he needs to nail shut the back door to government because it is actually causing so much damage.

"You don't make an investment in business unless you make a return on it," he said.

"You'd be naive to think that the political gene pool changed when you crossed the border from New South Wales to Queensland."

Dr Davis says he was not offered the opportunity to hand in his resignation.

"We had a situation on Thursday [the previous week] where the Treasurer, Tim Nicholls, had made a media comment, as I recall it, that the LNP was a very broad church," he said.

"The scenario changed between then and when I was called in on Tuesday, and I suspect that, as I say, was a number of complaints to the Premier and he felt obliged to send a message.

"I think it was a signal on a number of fronts.

"I think it was not just a technicality of the Cabinet solidarity message, I think I had trod on some very powerful toes.

"There was clearly a message that the Premier was entitled to send.

"It doesn't sting me so much but if you look at social media there has been a lot of concern about what sort of message it sends in terms of our style of government in Queensland, our tolerance, I guess, of democracy."

It remains unclear whether Dr Davis will recontest his seat.

He says he is committed to his Brisbane seat of Stafford and the LNP, but his pre-selection is a matter for the party.