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
From each according to his ability, to each according to his needs life but life's prime want". Marx explained his belief that, in such a society, each person would be motivated to work for the good of society despite the absence of a social mechanism "compelling" them to work, because work would have become a pleasurable and creative activity. Marx intended the initial part of his slogan, "from each according to his ability" to suggest not merely that each person should work as hard as they can, but that each person should best develop their particular talents. Claiming themselves to be at a "lower stage of communism" (i.e. "socialism", in line with