This is because it is a link in public policy, and affects the interests of a huge number of people, leading to competition between organized interests of people. As a result, different interest groups have different views of social welfare.
因為它是公共政策的一環，涉及非常多人的利益，和人與人之間組織利益的對抗，因此，不同的利益團體對社會福利就有不同的看法。