Seeney defends Qld casino processes

Deputy Premier Jeff Seeney has assured Queenslanders that proponents vying for a casino licence in Brisbane's CBD will be thoroughly vetted before one is chosen.

His assurances come after union United Voice released a statement on Wednesday questioning what it said were rushed probity checks around the Queens Wharf development before next year's state election.

Queensland secretary Gary Bullock said there was evidence to suggest Echo Entertainment had links with Hong Kong businessman Stanley Ho, who has been banned from a similar NSW bid.

Mr Bullock also said casino rival Crown had a better industrial record.

"We looked closely at these casino bids because we want to ensure both bidders are held to the highest standards," Mr Bullock said in a statement.

Mr Seeney said the winning bidder would not be revealed until a probity audit had been completed, which could be mid-next year.

"It's bizarre why a union would want to involve itself in this attempt to influence the process, but it certainly won't influence the process," Mr Seeney told reporters.

"It does, however, raise a lot of questions about its motivation and they are questions only they can answer."

Mr Seeney said the licence was highly sought after, so he expected intense competition between interested parties.

He said he expected detailed proposals from each bidder, including design plans, would be released publicly next week.