Sarita Nayyar 萨丽塔·纳亚尔
Discussions about economic development often focus on how to increase income equality. More recently， however， thoughtful observers have begun to regard consumption equality - the equal use of goods and services - as a more robust indicator of parity in human wellbeing. After all， it more accurately captures inequality as people experience it when they consume，and consumption can be affected by borrowing and saving， as well as by social safety-net programs.
But consumption equality is a double-edged sword. Although increased consumption by citizens of less-developed countries will improve the lives of millions， it will likely have negative consequences for the planet's already stressed environment. Furthermore， reducing the high levels of individual consumption in richer countries may result in short-term economic pain until new long-term sustainable production and consumption practices are in place.
One recent study of the interaction between the 17 United Nations Sustainable Development Goals found trade-offs between SDG 12 - Responsible Consumption and Production - and ten of the other goals. The stewards of the factors of production - mainly businesses and governments - must therefore carefully manage these trade-offs in pursuing the SDGs.
Demographics will likely play an essential role in driving greater consumption equality. This year， Generation Z， born between 1995 and 2010， will become the world's largest cohort， overtaking Millennials （born between 1980 and 1994）. Together， these two groups will likely be the world's most tech-savvy， sustainability-conscious consumers.
These generations have grown up with the so-called sharing economy. In general， they are not interested in buying things or owning assets like houses or cars; instead， they value experiences like new media， tourism， entertainment， and e-sports. And the resulting shift from conspicuous to conscious consumption is changing the face of consumerism.
Moreover， 80% of the world's middle class will live outside the United States and the European Union by 2030. These citizens will likely seek to improve their lives by consuming more - but not simply by copying developed-world consumption patterns. Rather， they will probably follow their own path， driven by an acute awareness and concern about the planet's sustainability.