even theft. George stated there should be one single tax: the Land Value Tax, which is considered both efficient and moral. Demand for specific land is dependent on nature, but even more so on the presence of communities, trade, and government infrastructure, particularly in urban environments. Therefore, the economic rent of land is not the product of one particular individual and it may be claimed for public expenses. According to George, this would end real estate bubbles, business cycles, unemployment and distribute wealth much more evenly. Joseph Stiglitz's Henry George Theorem predicts its sufficiency for financing public goods because those raise land value. John Locke stated that whenever labor is mixed with natural resources, such as is the case with improved land, private property is justified under the proviso that there must be enough other natural resources of the same quality available to others. Geoists state that the Lockean proviso is violated wherever land value is greater than zero. Therefore, under the assumed principle of equal rights of all people to natural resources, the occupier of any such land must compensate the rest of society to the amount of that value. For this reason, geoists generally believe that such payment cannot be regarded as a true 'tax', but rather a compensation or fee. This means that while Geoists also regard taxation as an instrument of social justice, contrary to social democrats and social liberals they do not regard it as an instrument of redistribution but rather a 'predistribution' or simply a correct distribution of the commons. Modern geoists note that land in the classical economic meaning of the word referred to all natural resources, and thus also includes resources such as mineral deposits, water bodies and the electromagnetic spectrum, to which privileged access also generates economic rent that must be compensated. Under the same reasoning most of them also consider pigouvian taxes as compensation for environmental damage or privilege as acceptable and even necessary. Theories Laffer curve In economics, the Laffer curve is a theoretical representation of the relationship between government revenue raised by taxation and all possible rates of taxation. It is used to illustrate the concept of taxable income elasticity (that taxable income will change in response to changes in the rate of taxation). The curve is constructed by thought experiment. First, the amount of tax revenue raised at the extreme tax rates of 0% and 100% is