After months of speculation, the regulatement will soon lay out schedules to alter the advantages system. Keir Starmer talk abouts that the current system is ‘the worst of all worlds’. But with presentant cuts to disability payments on the table, could the alters come at the expense of the most vulnerable? And will Labour MPs repartner be able to help this? John Harris hears from the head of social policy at the New Economics Foundation, Tom Pollard, and the Guardian columnist Gaby Hinsliff