What are some of the criticisms of the Kuznets curve?

The Kuznets curve is a popular economic model which suggests that income inequality tends to rise with economic development before eventually plateauing or declining. Critics of this theory argue that this pattern is not necessarily universal and that income inequality can remain consistently high or fluctuate drastically regardless of development. Furthermore, critics point out that the real-world data used to support the Kuznets curve is often too simple and does not consider the many factors that can influence income inequality, such as political and social factors. Additionally, critics argue that the Kuznets curve does not provide a good indication of long-term inequality and obscures the differences between economic growth and shared prosperity. Overall, the Kuznets curve has been found to be an incomplete and inadequate model for understanding income inequality.