It is reasonable of a Labor party person to argue that the contract approach should recognise that the source of some wrongs are social and not able to be sheeted home to an individual. It is also reasonable to argue that the citizenship theorists should recognise the costs of no-one bearing any responsibility other than at the societal level. For example, it can be argued that the poor are victims of circumstances, and the government has a duty to remedy their problem. But even in circumstances not entirely of their own making people are personally responsible for their actions. If poverty is the result of external forces, and these are unjust, the 'victim' is entitled to compensation.
Welfare rights are resource rights.
They demand that political power be used to take the earnings or savings of one group for transfer to another. Such rights can divide the community into warring factions, and undermine the consensus and consent necessary to operate the system. To some extent there are assumptions creeping into the welfare state that I doubt have any broad support in the electorate.