Laffer curve and many others advocate a zero capital gains rate. The increased aggregate supply would result in increased aggregate demand, hence the term "supply-side economics". Laffer assumes that the government's revenue is a continuous function of the tax rate. However, in some theoretical models, the Laffer curve can be discontinuous, leading to an inability to devise a revenue-maximizing tax rate solution. Additionally, the Laffer curve depends on the assumption that tax revenue is used to provide a public good that is separable in utility and separate from labor supply, which may not be true in practice. The Laffer curve as presented
To each according to his contribution that the citizens of a workers' society should be rewarded according to individual contributions, Marx claims that giving them the "full product" of their labor is impossible as some of the proceeds will be needed to maintain infrastructure and so forth. He then explains the nature of a communist society in its lower phase ("socialist society"), which does not emerge from its own foundations "but, on the contrary, just as it emerges from capitalist society; which is thus in every respect, economically, morally, and intellectually, still stamped with the birthmarks of the old society from whose womb it emerges". And