 Among principles of justice that are straightforwardly non-comparative are ‘sufficiency’ principles which hold that what justice requires is that each person should have ‘enough’, on some dimension or other – for instance, have all of their needs fulfilled, or have a specified set of capabilities that they are able to exercise (for a general defence of sufficiency, though not one that links it specifically to justice, see Frankfurt 2015; for a critique, see Casal 2007). Such principles, however, need to be supplemented by other principles, not only to tell us what to do with the surplus (assuming there is one) once everyone has sufficient resources, but also to guide us in situations where there are too few resources to bring everyone up to the sufficiency threshold. Should we, for example, maximise the number of people who achieve sufficiency, or minimise the aggregate shortfall suffered by those in the relevant group? Unless we are prepared to say that these are not matters of justice, a theory of justice that contains only the sufficiency principle and nothing else looks incomplete.