Sustainable production and consumption allows every individual to meet their basic needs and societies to flourish, all with limited overall throughput constrained by ecological ceilings. The question is how exactly basic needs satisfaction, flourishing societies, and limited throughput can come together. Based on the insight that decent living standards constrain the slope of the Lorenz curve for the lowest decile, a simple model can be derived that determines total consumption from only three factors: per capita decent living standards, the Gini coefficient of inequality and population. With a constraint on maximum living standards, overall consumption splits into three components: basic needs satisfaction, prosperous consumption, and excessive consumption. The model calculates sustainable consumption corridors based on decent living standards and the acceptable maximum under ecological ceilings, while still allowing for reasonable levels of inequality and ample prosperous consumption. The model can be applied to economic and physical stock and flow indicators, and examples for all four combinations are provided. The work concludes with calling upon the research community to assess the inequality of physical stock and flow indicators related to human wellbeing, identify suitable physical wellbeing measures, and extend the debate on desirable levels of inequality to physical socio-metabolic indicators.

中文翻译：

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洛伦兹曲线中的体面生活水平、繁荣和过度消费

可持续生产和消费使每个人都能满足其基本需求，并使社会繁荣发展，但总体吞吐量受到生态上限的限制。问题是基本需求的满足、繁荣的社会和有限的吞吐量到底如何结合在一起。基于体面生活水平限制洛伦兹曲线最低十分位的斜率这一认识，可以推导出一个简单的模型，仅根据三个因素确定总消费：人均体面生活水平、不平等的基尼系数和人口。在最高生活水平的约束下，总体消费分为三个部分：基本需求满足、繁荣消费和过度消费。该模型根据体面的生活水平和生态上限下可接受的最大值计算可持续消费走廊，同时仍然考虑到合理水平的不平等和充足繁荣的消费。该模型可应用于经济和实物存量和流量指标，并提供了所有四种组合的示例。这项工作最后呼吁研究界评估与人类福祉相关的物质存量和流量指标的不平等，确定合适的物质福祉措施，并将关于理想不平等程度的辩论扩展到物质社会代谢指标。