Laffer curve rates (for example, in the United States by the Congressional Budget Office). While the interaction between tax rates and tax revenue is generally accepted, the precise nature of this interaction is debated. In practice, the shape of a hypothetical Laffer curve for a given economy can only be estimated. The relationship between tax rate and tax revenue is likely to vary from one economy to another and depends on the elasticity of supply for labor, as well as various other factors. Even in the same economy, the characteristics of the curve could vary over time. Complexities such as progressive taxes
To each according to his contribution the amount of labor contributed increases. However capitalism can lead to a situation where the means of production are owned by a small minority who do not produce, but rather live off the labor of others. Socialism is said to remedy this by putting the means of production in common hands and rewarding individuals according to their contributions. In the "Critique of the Gotha Programme", while criticizing Lassalle's ideas, Marx elaborates on the theory. According to Marx's analysis of the Programme, Lassalle suggests that "the proceeds of labor belong undiminished with equal right to all members of society". While agreeing