The rest goes into social programmes which have begun to eclipse Arafat's Palestinian Authority. While Arafat's administration has a reputation for stealing from the poor, the Hamas network known as the "dawa" - medicine - runs subsidised super markets, rebuilds homes destroyed by Israeli tanks, supplies school materials to the needy, food on religious holidays, free clinics and runs hundreds of free religious schools. "Sharon's policies and Bush's support for them have meant that there already is a vacuum in Palestinian society. If it gets any worse, it will be entirely filled up by Hamas and other Islamic groups and that would be a catastrophe for us all," warned Saleh Abdi Jawad, a professor of politics at Beir Zeit University on the West Bank.