Economic stratification should not be confused with the related concept, economic inequality. This deals with the range of wealth, rather than the existence of distinct strata. Economic inequality and economic stratification can coincide, of course.
The causal conditions for stratification include:
Many of these effects also act as causative factors. This induces progressively greater stratification unless action is taken to limit a runaway condition. Corruption of the feedback mechanism is the most dangerous threat to any balanced system, since it can lead to economic oscillations of increasing magnitude until runaway inflation or depression results. A historical example of runaway stratification is the Great Depression of the late 1920's and 1930's. As Monopolies gained increasing power and influence, the working class gradually lost purchasing power until other factors, such as the bank failures, coincided to produce an economic collapse. Such collapses can occur because the circulation of capital (M1) in such systems becomes highly dependant upon continually increasing apparent quantities of M2. A percentage of M2 is continually being converted into M1 until a point is reached in which the rate of conversion of M2 into M1 cannot be sustained by the available quantity of M1. In the case of the great depression M2 refers to stocks and bank notes. When it became apparent that the valuation of M2 exceeded the supply of M1, a panic ensued to convert M2 to M1, resulting in the rapid apparent devaluation of M2, and the stock market crash of 1929. In the case where M1 is increased to support the incraeasing conversion of M2 into M1, inflation increases until the physical supply of M1 becomes unwieldy and the result is also economic collapse, as is the case in Germany during the same period.
It is apparent that under these conditions, neither increasing the supply of M1 nor decreasing it (relative to M2) can effectivly prevent an economic collapse. Therefore it can be postulated that economic stratification itself ultimately results in economic collapse of one degree or another. An effective legislative process can prolong the period between collapses, but since one of the effects of stratification is the degredation of this process, it becomes a self accelerating process.