Young people experience different treatment compared to older adults in the English welfare and homelessness systems, encountering varying levels of protection and disadvantage. This paper uses a value-pluralist perspective to explore the normative rationales for and the ethical defensibility of these policy differences. Evidence from 38 key informant interviews suggests that the English homelessness system is shifting towards a vulnerability-oriented response to young people. But an inconsistent value framework within the welfare system systematically disadvantages them without offering a corresponding degree of protection. As such, these closely-connected areas of social policy pull in opposing directions. Although individual positions targeting young people may (to greater and lesser extents) be justifiable, this disparity in values creates an incoherent and indefensible welfare policy landscape for this group.