Head of strategy at loggerheads with party over plan to help lowliest workers in government departmentsDavid Cameron's head of strategy is losing a battle that would see the Conservative party introduce a higher minimum wage across Whitehall, the Guardian has learned. Steve Hilton wants his party to announce a higher rate, the so-called "living wage" of £7.60 – which is £1.80 more than the minimum wage – for low paid workers employed as cleaners and catering staff across government departments in London if the Tories win the election.Hilton, one of the leading modernisers around Cameron, has cast it as a first step towards bringing in the new rate more widely across the country as he pushes for policies that prove ...