Labor leader Rebecca White in her address said Labor had always been the party to ensure fairness for the state's population and the champion for working people and the underdog.

"And right now in this beautiful state that we all love, there are too many of our neighbours, our family, our friends who have been left behind," she said.

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"It is only the Labor party that will be their champion."

Ms White said the state's health system was at its worst after seven years of a Liberal government and the state's housing crisis was progressively worsening.

She said underemployment and insecure work had become the norm.

Ms White said at the height of the coronavirus pandemic, Tasmanians had been shown that a government could change people's lives for the better through the stroke of a pen.

"The failure to tackle inequality, underemployment, health waiting lists, or homelessness was exposed as a policy choice of the government - something they had the power to change," she said.

The campaign launch was attended by former Labor premiers Doug Lowe, Michael Field, Paul Lennon, David Bartlett, Lara Giddings, former Labor leader Bryan Green, and federal Labor leader Anthony Albanese.

Mr Bartlett and Ms Giddings served as leader while in co-operative government with the Greens.

Ms White said it was a mistake for Labor to work with the Greens under that arrangement and it was something the party would never do again.

"They do not seek consensus, they ridicule and talk down to anyone who doesn't agree with their view," she said.

"They leave working people behind - they leave our people behind.

"Between the mismanagement of the Liberals and the outright opposition of the Greens, opportunities are slipping through our state's fingers."