to 34 per cent. Rudd extended his lead by 2 points to 50 per cent, with Howard down by 2 points to 37 per cent. On the first full day of the campaign, Howard and Costello announced a 'major restructuring of the income tax system' with tax cuts worth $35 billion over three years and a tax cut "goal" for the next five years. A few days later, Rudd released his policy which supported the reform measures, however offered education and health tax rebates instead of immediate cuts to the top rate as proposed by the Liberal Party, with a slower progression for the top rate. The Liberals slogan, "go for growth" was launched after announcing the largest tax cut in Australian history. Media and political commentators questioned the suitability of the slogan in the context of rising inflation and interest rates. During the latter part of the week union influence over the ALP was questioned after the launch of the Liberal party's first campaign ads. Labor responded with commercials attacking the Liberals' campaign as 'smears', which was disputed by John Howard. One of the Liberal Party election commercials was corrected after it incorrectly said Wayne Swan and Craig Emerson had previously been union officials. Leaders' debate A debate between the Leader of the Opposition and the Prime Minister, under the moderation of the National Press Club, was shown live on ABC TV, the Nine Network, and Sky News Australia at 7.30 pm on 21 October. Rudd had called for a minimum of three debates between himself and Howard, while Howard, who had been rated poorly by studio audiences at past leadership debates, pressed for a single debate. A total of 2.4 million Australians watched the event, with Nine averaging 1.42 million, the ABC averaging 907,000, and Sky News averaging 62,000. The last election debate in 2004 was watched by 1.77 million on Nine and the ABC, while in 2001, average audiences on Nine, Seven and the ABC totalled 2.44 million. David Speers, Sky News's political editor, moderated the debate which was held in the Great Hall of Parliament House. The debate audience was 400, with the Coalition and Labor each selecting 200. Kevin Rudd argued that the Liberal Party was being influenced by the H. R. Nicholls Society to make further reforms to industrial relations, citing Nick Minchin's speech at the Society's 2008 conference where he told the audience