In his 2015 leadership bid, Burnham pledged to commit Labour to "a policy of progressive renationalisation of the railway system". Burnham also favours a universal graduate tax to replace student tuition fees, and voted against the most recent increase in fees. He has advocated a 'National Care Service', integrating care services into the National Health Service Burnham's key economic policies in his leadership bid included a new levy to fund social care, extending the higher minimum wage to all ages (it currently only applies to those over 25), and banning zero-hour contracts. Burnham described the mansion tax proposed by Ed Miliband as "the politics of envy", saying he knew it would lose votes when his mother phoned and told him it represented a return to the 1970s.