Australian senators will vote on holding a full Senate inquiry into Australia's unsuccessful bid for the 2022 football World Cup on the first sitting day of Parliament next year, after a two-year investigation by FIFA into the 2018 and 2022 World Cup bids criticised Australia's conduct.

The bid, run by the Football Federation of Australia (FFA) using $42 million of public money, only secured one vote out of 22 of the FIFA Executive Committee, which awards the rights to hold the World Cup.

The summary of FIFA's investigation found Australia attempted to woo members of FIFA's Executive Committee.

It also found "potentially problematic connections between financial and other support for 'football development' [in other countries] and the bidding process," and that the bid team attempted to divert money set aside for development projects in Africa towards initiatives in countries with ties to FIFA Executive Committee members.

On Wednesday, lead investigator Michael Garcia resigned over FIFA's handling of the report.

"There's been a deafening silence in response to the FIFA investigation and there are some very serious questions that the Australian community deserve to have answered," said Greens senator Richard di Natale, who tabled the motion for holding a full Senate inquiry.

The summary of FIFA's investigation also found there was "a prima facie case that two [unnamed] consultants violated the bidding and ethics rules".

Consultant twice acquitted of trafficking cocaine

The FFA employed three international consultants to advise on the bid: Peter Hargitay, Andreas Abold and Fedor Radmann.

Mr Radmann, who received $3.6 million in consultancy fees from the Australian bid, was named in conflict of interest scandals linked to Germany's successful bid for the 2006 World Cup.

Mr Hargitay was twice acquitted for cocaine trafficking in the 1990s.

The FFA hired Mr Abold's firm to produce what is known as the bid book, a 760-page document containing all the details of Australia's bid.

Mr Radmann was subcontracted as a lobbyist through Mr Abold's firm.

Last month, new allegations about Mr Abold and Mr Radmann were tabled in the British Parliament.

In a submission to an inquiry into the World Cup bidding process, the Sunday Times, which has run a number of exposes on corruption in international soccer, alleged "Andreas Abold and Fedor Radmann were soliciting payments in connection with the vote of [an] executive committee member".

"They were understood to have communicated to a number of bids that [a] vote would be guaranteed if they were hired as consultants for a fee of millions of pounds," the submission stated.

There was no allegation that any country agreed to the alleged vote buying deal.

Mr Radmann and Mr Abold both denied the claims.

No explanations given for $4 million budget blowout

7.30 has obtained an internal FFA budget from 2009 which allocated $7 million to be spent on the bid book and associated expenses.

However, by 2011, the cost had blown out to $11.02 million.

7.30 asked the FFA to explain why there was such a significant increase in this particular expense and for a detailed breakdown of what the $11.02 million had been spent on.

It declined to give details, simply saying in a statement: "Budgets ... did indeed vary ... This is entirely normal."

But Lord David Triesman, who chaired the England bid for the 2018 World Cup, said he could not understand how $11 million could be spent on the bid book.

"If you are going to print it on gold leaf, I expect you could rack up the cost," he said.

"But, no, the straightforward answer is no I can't."

England's bid book cost 4 million pounds, half the amount spent by Australia.

Consultants not hired to secure committee votes: FFA

In response to the question of whether the FFA was confident that all the money paid to Mr Abold and Mr Radmann was spent ethically, a spokesman for the FFA said in a statement: "Consultants were not hired on the basis of securing the vote of a particular FIFA ExCo [Executive Committee] member."

"All World Cup Bid expenses have been audited and signed off by external auditors and accepted by government," the spokesman said.

That explanation is not enough for Senator di Natale.

"It's unthinkable that costs would blow out by a factor of 50 per cent on an activity where I think there's some general understanding about the costs that would be involved upfront," he said.

"I think there are real questions to be asked about the increasing costs with that aspect of the bid."

Senator di Natale said a vote to hold a full Senate inquiry into the Australian bid would be held on the first sitting day of Parliament in February next year.

"There are big questions around the use of development money, potentially to secure votes," he said.

"There are big questions about some of the people that were involved in our bid.

"So I think that it's absolutely imperative on the Australian Government to make sure that it's spending its money wisely and that the money used for the World Cup bid wasn't used for purposes other than what it was intended for."

Watch the story tonight on 7.30 on ABC