Laffer curve at an intermediate rate of taxation, and then falls again to zero revenue at a 100% tax rate. However, the shape of the curve is uncertain and disputed among economists. Under some assumptions, such as revenue being a continuous function of the rate of taxation, the maximum illustrated by the Laffer curve is a result of Rolle's theorem, which is a standard result in calculus. One implication of the Laffer curve is that reducing or increasing tax rates beyond a certain point is counter-productive for raising further tax revenue. A hypothetical Laffer curve for any given economy can only be
From each according to his ability, to each according to his needs From each according to his ability, to each according to his needs "From each according to his ability, to each according to his needs" is a slogan popularised by Karl Marx in his 1875 "Critique of the Gotha Program". The principle refers to free access and distribution of goods, capital and services. In the Marxist view, such an arrangement will be made possible by the abundance of goods and services that a developed communist system will produce; the idea is that, with the full development of socialism and unfettered productive forces, there will be enough to satisfy everyone's needs. The