Serbians will vote in snap polls Sunday, with the ruling Serbian Progressive Party (SNS) tipped to capitalise on a wave of public support after successfully opening talks on EU membership. Some 6.7 million voters have been called to the polls to elect a new 250-seat parliament with a four-year mandate in the early vote called after Belgrade launched talks in January with Brussels to join the European Union. Long seen as a pariah for its role in the 1990s Balkan wars, Serbia, the largest country to emerge after the break-up of Yugoslavia, now hopes to join the 28-member bloc by 2020. The outgoing government led by Socialist Prime Minister Ivica Dacic won support from Brussels to begin membership talks only after a historic accord with its long-time foe Kosovo last year. But Kosovo, once the most sensitive issue in Serbia which still refuses to recognise its 2008 declaration of independence, has now been overshadowed by the dire economic situation in the country of 7.2 million people. A fifth of Serbia's workforce is unemployed and the average monthly salary is 350 euros ($480). With public debt rising to more than 60 percent of GDP, the future cabinet will have to reform obsolete labour laws and cut down on burgeoning bureaucracy, experts say. -'Landslide victory needed' - The ruling centre-right SNS and its leader Aleksandar Vucic -- a fierce ultra-nationalist turned pro-European -- said a new mandate was needed to push forward with "difficult and extremely painful economic reforms." "We need a landslide victory to create new jobs, firmly pursue reforms and fight corruption with full force," Vucic told supporters at a final rally this week. Serbia's eight-billion-euro budget ($11 billion) is suffocated by some 1.7 million pensioners and a bloated public sector that employs more than 700,000 people. The future government will have to push through a stringent austerity package of privatisation of more than 170 state-owned companies, subsidy cuts and tax increases in a bid to reduce spending and get people back to work. Despite the gloomy economy, the SNS is riding high in the polls with 44 percent of voter support. Vucic, tipped to become prime minister, has spearheaded his party's gain in popularity thanks to a high-profile anti-graft drive which has led to the arrest of several tycoons and former ministers. The Socialists, who joined forces with the SNS after elections in May 2012, are polling second with around 14 percent. The opposition Democratic Party is trailing behind with around 11 percent. The Democrats, failing to find common ground with other opposition parties to fight the SNS, have set their sight to win back control of Belgrade city hall in municipal polls held on the same day. Polling stations will open at 0600 GMT and close 13 hours later with hundreds of international and local observers monitoring the vote. Preliminary results are expected early Monday, with final results due by March 20.