credit was something that really existed only for the middle and upper classes; for the poor there was only usury, the ruthless exploitation of poverty by various kinds of money-lender. Especially from the 1950s onwards, a multiplicity of forms of consumer credit have penetrated the daily lives of the masses, all of them new forms of usury, driving people into debt and skimming a share of the surplus out of workers’ wages through interest payments. For the wealthy, the credit system invents new and newer forms every year. Since the 1970s, forms of credit operating in the world of finance – future, commodity speculation, the purchase and sale of debt itself, and so on – have far outstripped paper money and constitutes a huge burden of fictitious capital on the backs of the working class and an enromously unstable ocean of value that can sweep whole economies away in its ebbb and flow.
See Volume III of Capital, especially chapters 21 to 27 for a more detailed analysis of credit.
Crisis of Capitalism
The word “crisis”, used in reference to the economic system, may be in connection with (i) a conjunctural crisis, (ii) the cyclical crisis or “business cycle”, or (iii) the historic crisis of capitalism.
A conjunctural crisis can only be discussed in connection with the specific conditions involved in the given case, and generalisation is impossible. For example, such crises can be caused by defeat in war, or by being overtaken economically by a rival power, or as a result of a weak or incompetent government, or as a result of the loss of the natural conditions for production, such as where the environment has been destroyed by industry.
It is, however, particularly the cyclical and historical crises of capitalism which have absorbed the attention of Marx and other revolutionaries over a long period of time, and have been the subject of important theoretical debate down the years.
In the opening chapters of Capital Marx explains why cyclical crises are characteristic of capitalism:
“If the interval in time between the two complementary phases of the complete metamorphosis of a commodity become too great, if the split between the sale and the purchase become too pronounced, the intimate connection between them, their oneness, asserts itself by producing - a crisis. The antithesis, use-value and value; the contradictions that private labour is bound to manifest itself as direct social labour, that a particularised concrete kind of labour has to pass for abstract human labour; the contradiction between the personification of objects and the representation of persons by things; all these antitheses and contradictions, which are immanent in commodities, assert themselves, and develop their modes of motion, in the antithetical phases of the metamorphosis of a commodity. These modes therefore imply the possibility, and no more than the possibility, of crises. The conversion of this mere possibility into a reality is the result of a long series of relations ..”
and in one of the last fragments of Volume III:
“... production relations are converted into entities and rendered independent in relation to the agents of production, ... the interrelations, due to the world-market, its conjunctures, movements of market-prices, periods of credit, industrial and commercial cycles, alternations of prosperity and crisis, appear to them as overwhelming natural laws that irresistibly enforce their will over them, and confront them as blind necessity. ...”
It is also said that capitalism is in permanent crisis, as capitalism is constantly transforming the labour process and revolutionising the relations of production, driven by the unresolvable contradiction between capital and labour. Or, to put it another way, capitalism is unsustainable development by its very nature.
http://www.marxists.org/glossary/terms/c/r.htm