Philipp Kanschik

The indifference objection is one of the most powerful objections to sufficientarianism. Critics argue that sufficientarianism is objectionably indifferent to the distribution of benefits and burdens. This article focuses on the criticism of the latter, particularly the claim that sufficientarianism is indifferent to taxation. Contrary to this allegation, it is argued that sufficientarianism warrants progressive taxation, the reason being that even those who are sufficiently well off face the risk of being pushed below sufficiency. This risk decreases the better off someone is as it is easier for those who are better off to deal with sufficiency-threatening circumstances. It is argued that the risk of insufficiency understood as a function of distance to the threshold justifies progressive taxation. The proposed line of reasoning corresponds to the sufficientarian belief that there should be no redistribution between the rich, as the differences in risk of insufficiency eventually become marginal among those who are very well off. Moreover, the proposed rationale for progressive taxation does not depend on prioritarian or egalitarian reasoning. Rather, it transpires that sufficientarianism is well-suited to justify the progressive redistributive system of the modern welfare state.

The notion of sufficiency has recently gained some momentum in separate discourses on distributive justice ('sufficientarianism') and the environment ('eco-sufficiency'). An investigation of their relationship is warranted, as their scope overlaps in areas such as environmental justice and socio-economic policy. This paper argues that the two understandings of sufficiency are incompatible, because eco-sufficiency has adopted an extremely perfectionist view of the good life while sufficientarianism is committed to pluralism. A plausible explanation for this incompatibility relates to the two different meanings of the term sufficiency as a limit (eco-sufficiency) and as a minimum requirement (sufficientarianism).