“收入体制的紊乱 ,是形成中国隐形收入问题的一个重要根源。”这是中国社会分配和社会分层问题权威、清华大学人文学院院长李强教授的见解。他认为 ,中国社会中存在的隐形收入可以划分为三个层面。工资外收入收入体系中的一个紊乱现象 ,是许多单位内收入不是从正式工资中获得 “The disorder of the income system is an important source of the formation of China’s invisible revenue problem.” This is the authority of China’s social distribution and social stratification, Professor Li Qiang, dean of the Humanities Institute of Tsinghua University. He believes that the invisible revenue that exists in Chinese society can be divided into three levels. A disturbing phenomenon in the system of income-earning income is that in many units income is not earned from official wages