The Queensland government will take on the financial risk of a $1.7 billion electricity transmission line project connecting the state's north-west mining region to the national grid.
Premier Annastacia Palaszczuk started the second day of the election campaign in the seat of Traeger, which takes in Mount Isa, and which is held by Katter's Australian Party MP Robbie Katter with a 28.5 per cent margin.
She says the government is backing the CopperString 2.0 project to reduce power prices for businesses, help develop rare earth minerals mining and protect local jobs.
"This is nation building, this is when you're talking about a vision for the future. And this election should be about what do Queenslanders want to see for the future," the premier said on Wednesday.
Ms Palaszczuk denied the move was designed to gain support from KAP crossbenchers if voters deliver a hung parliament on October 31.
"This is something that we have been focused on for a long, long time. It's been something that has been raised with us," she insisted.
"And as you can see, even the federal government in its budget last night is coming on board."
The premier received another YouGov poll boost on Wednesday, with the Labor leader ahead of her LNP counterpart Deb Frecklington on the question of who was a better economic manager, 40 per cent to 27 per cent.
It follows a YouGov poll released on Tuesday showing Labor leading the Liberal National Party 52 per cent to 48 per cent on a two-party preferred basis.
Ms Palaszczuk said voting for the opposition would derail Labor's plans to kick-start the economy with the participation rate, or the percentage of people working or looking for work, rising.
"What's fundamentally important to me is people's jobs, because without a job you can't put food on the table, you can't pay the rent, you can't pay the mortgage, you can't buy the books and the school shoes for your children," she said.
"It's fundamentally important to have a job - a good, decent job."
The premier promised a majority Labor government would hand down a budget by the end of the year now that the federal government has handed down its budget.
The Labor leader also ruled out further taxes, after five new taxes were unveiled ahead of the 2017 election.
About 3.3 million Queenslanders go to the polls on October 31.
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