Doubt is being thrown over the deliverability of big construction projects in the capital, where there is roughly a 140 per cent shortfall in the number of construction workers.

Across the entire country, it is estimated an extra 65,000 workers are needed to be able to complete the programme of works being launched by both the private and state sector.

Some are now wondering if many projects will not be delivered, due to lack of workers.

The situation is particularly precarious in the capital, where there are plans to spend $18 billion over the next four years on projects.

Construction Industry Council chair Graham Burke told Heather du Plessis-Allan there have been skills shortages in construction for as long as he can remember, and it is a systemic problem that needs long-term solutions. 

"One of the big problems with construction is the booms and busts that the industry's had over decades, and the only people who can do anything about that is the Government because they are by far the biggest procurer."

He said that there needs to be a de-politicisation of spending, alongside a long-term infrastructure strategy and a strategic look at workforce skills. 

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