'Game-changing' policy is the key to clinching voters in South Australia, The Advertiser-Galaxy poll shows Opposition leader Steven Marshall and Premier Jay Weatherill. SOUTH Australians believe the Liberal Opposition has both a better economic plan and vision for the state than the Labor State Government, exclusive polling shows. An Advertiser -Galaxy poll of 860 people taken on Wednesday night showed the Opposition ahead 54-46 statewide and leading in the key battleground of metropolitan Adelaide. Today, it can be revealed the Liberals also lead in two other key areas. Forty-one per cent of voters said the Liberal Party had the best economic plan for SA, compared with 34 per cent who backed Labor on the same issue. A quarter of people were undecided, indicating there is a large number of voters to be won over in the four-month election campaign to be fought between now and March. The result comes against the backdrop of rising unemployment in SA, a Budget that has been plunged deep into the red and high concern about the future of Holden's Elizabeth plant. The shelving of the Olympic Dam expansion last year may also be playing on voters' minds. The Opposition has released a five-point "action plan" that includes a promise to "grow our economy." Its main economic policy promise so far has been $230 million in payroll and parking tax cuts. They have not earmarked any Budget savings to fund it. Premier Jay Weatherill has announced plans for a Future Fund to be filled by mining royalties once the Budget returns to surplus, currently forecast to be in 2016. His June Budget included two years of temporary payroll tax relief for businesses with wage bills of up to $1 million. Asked which party had the best vision for the future of SA, 38 per cent of voters said the Labor Party and 41 per cent favoured the Liberals. Twenty-one per cent were undecided. This comes despite Labor's multibillion-dollar infrastructure spend including upgrades to the Adelaide Oval, construction of the North Tce medical precinct and transport improvements. Galaxy Research managing director David Briggs said the result showed the Liberals had a slim advantage but voters saw "little to choose from" between the two parties. BusinessSA chief executive Nigel McBride said the state needed to think big and come up with "game-changing" policies that could create new industries and jobs growth. He said there had been under-investment in tourism, education and agriculture and all were potential boom sectors if businesses could be helped to break into new markets. "What I'm hearing from the business community as a lament ... is the lack of courageous thinking, outside of the box strategies to get the economy going," Mr McBride said yesterday. The business community is just aching for some visionary decisions. Both parties have teased the business community with indications there's more to come.