Yet, for policy-analysis purposes, looking at redistribution indicators alone is arguably not sufficient, as the perceived need for redistribution is unlikely to remain constant over time. This can be because inequalities before redistribution have changed, or because social attitudes towards inequality have become more or less egalitarian. For instance, with unchanged social attitudes towards inequality, a less equal distribution of market incomes would make a given extent of redistribution less costly in social-welfare terms, and more redistribution would be desirable in this case.