Laffer curve is simplistic in that it assumes a single tax rate and a single labor supply. Actual systems of public finance are more complex, and there is serious doubt about the relevance of considering a single marginal tax rate. In addition, revenue may well be a multivalued function of tax rate; for instance, an increase in tax rate to a certain percentage may not result in the same revenue as a decrease in tax rate to the same percentage (a kind of hysteresis). Furthermore, the Laffer curve does not take explicitly into account the nature of the tax avoidance taking place.
To each according to his contribution as a system whereby the laborer receives the full product of his labor through the elimination of exploitation and accrual of unearned income to a capitalist class. The term means simply that each worker in a socialist society receives compensation and benefits according to the quantity and value of the labor that he or she contributed. This translates into workers of high productivity receiving more wages and benefits than workers of average productivity, and substantially more than workers of low productivity. An extension of this principle could also be made so that the more difficult one's job is—whether this difficulty