Volitility from global dynamics.
For the reason of clarity there are three definitions of Income.
1)Gross Income calculated as: GDP-[(Exports-Imports)+(Saving-Investment)+Government Spending]
2)Gross Income Adjusted to remove corporate and commercial transactions, often a near identity with public debt added on behalf of those parties.
3)Personal Income = Gross Income Adjusted / Population.
The culture of a nation may or may not be reflected in the laws of the same country. There are times when a minority holds power over a majority. There are occasions when a majority inherits undesired laws and they are incapable of improving their society. The Gross Income of a nation and the personal incomes of an individual are, for the most part, determined by laws. There is a physical relation between domestic resources and the energy consumed with physical output however that does not always equate to an proportional monetary income. Some nations hold high taxes to provide a large portion of the mean basket of goods and services while other nations allow discretion of choice for personal consumption. In a notional world, at 10% tax collection of income, 67% of GDP is personal income; at 60% tax collection of income, 44% of GDP is personal income.
Statistically, the percent of income collected by tax does not effect the percent change of Gross Domestic Product, Income, or Debt. Unlike the difference between Per Capita GDP and GDP growth being determined by population growth, there appears to be an affect of debt of GDP growing faster than income.
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Converting Local Currency Units to "Imaginary Global Dollars" whether described as Power Purchasing Parity or Foreign Exchange Market Rates can be entertaining. While the conversion allows an illustration of equivalence in reality there isn't enough dollar liquidity for United States assets to be valued where they are without a fixed legal framework which prevents realization of true economic, financial, and accounting values. So to draw too many conclusions from a sum of fantasy world dollar equivalent units could be an ignorant combination of wishful thinking and delusion.
For developed nations, the financial risks of political promise. For poor, small, or undeveloped nations, the risk of imports and exports disturbing discretely dependent supply and demand which are proportionately larger than a set of equivalent trade agreements in larger economies.
These statements seem trivial, however subsets of larger economies can have mineral or energy risks due to dependence. One weather event or accident can change an exchange rate when exchange rates are legally allowed to "float" or politically allowed to find equilibrium.
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