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(4) Effect on society
Some would say that market forms and other means of distribution of scarce goods suggested by economics affect what people consider to be not just their "desires and wants" but also "needs" and "habits". Much of so-called economic "choice" is involuntary, certainly given the conditioning that people have to expect a certain quality of life. This leads to one of the most hotly debated areas in economic policy, namely, the effect and efficacy of welfare policies. Libertarians view this as a failure to respect economic reasoning. They argue that redistribution of wealth is morally and economically wrong. And socialists view it as a failure of economics to respect society. They argue that disparities of wealth should not have been allowed in the first place. This led to both 19th century labor economics and 20th century welfare economics before being subsumed into human development theory.
The older term for economics, political economy, is still often used instead of economics, especially by certain economists such as Marxists. Use of this term often signals a basic disagreement with the terminology or paradigm of market economics. Political economy explicitly brings political considerations into economic analysis and is therefore openly normative, although this can be said of many economic recommendations as well, despite claims to being positive. Some mainstream universities (many in the United Kingdom) have a "political economy" department rather than an "economics" department.
Marxist economics generally denies the trade-off of time for money. In the Marxist view, concentrated control over the means of production is the basis for the allocation of resources among classes. Scarcity of any particular physical resource is subsidiary to the central question of power relationships embedded in the means of production.