If the use of material resources generates welfare, then equalizing welfare will attain substantive outcome equality even among people who exhibit different levels of efficiency in welfare generation. An able-bodied person may require fewer resources than a disabled person to achieve a given level of well-being. Suppose a disabled person needs a wheelchair. If she holds an equal amount of resources as a non-disabled person, then the able bodied person is better off than the disabled person. The disabled person must exchange resources for a wheelchair. So either she is not mobile or she is mobile but has fewer remaining resources than the able-bodied, and in either case she is worse off. Welfare equality accounts for variation in talents and abilities and opportunities. Equality of welfare attempts to neutralize the impact of these variations on the distribution of welfare.