"NBN Co will work with the training industry to ameliorate the impacts of possible labour shortages."

Following the release of the Access Economics report, the firm's director, David Rumbens, said competition from the mining boom and reconstruction efforts would likely place a strain on skills supply and could effectively slow the rollout speed of the NBN.

"Yes, we do believe delays are likely, given the scale of resources projects and flood reconstruction work along with the NBN," Rumbens, told .

"This is coming at the same time as a slowing down in workforce growth, as net overseas migration has fallen and the rate of retirements looks set to increase."

A suggested public support for the NBN could be on the wane with results showing both Liberal/National and Labor voters favoured the private sector, rather than the government to deliver broadband services.