This is not the case, but rather the opposite is true. Poverty causes single parenthood. Poverty prevents and disrupts marriage. In the U.S. we assume that the male is the primary means of economic support for a family. This has several consequences.
Poverty is even more strongly associated with births outside marriage.
Poor inner-city women experience a severe shortage of men who would make suitable marriage partners because many of the men available to them are either unemployed, imprisoned, or killed. Yet another factor in continuing poverty is the lack of knowledge regarding birth control, and, like everything else, the lack of adequate health care. It is for these reasons that poverty contributes to the single-parent householder problem. Poverty is not the fault of the individual but rather the result of various social forces working against the individual. The lack of opportunity, not lack of material goods, causes the poor to stay poor.