The ‘bedroom tax’ is a policy about the allocation of two kinds of limited public resources: council accommodation and housing benefits. Council tenants no longer receive full housing benefit if they occupy rooms that the regulations say they do not need. They must make up the rent shortfall if they can, or move out so their homes become available to larger families who need the space. Policies that shift the allocation of such resources are political, if not the very essence of politics in a modern democratic state. But so are the legal cases that they generate. The claimants in the recent judicial review of the tax were disabled and vulnerable children. They challenged the policy on the basis that it discriminated unlawfully against them by failing to recognise their special need for space that the regulations held to be surplus to their requirements.