working class. The debate on the ability for social democratic reformism to lead to a socialist transformation of society is over a century old. Reformism is criticized for being paradoxical as it seeks to overcome the existing economic system of capitalism while trying to improve the conditions of capitalism, thereby making it appear more tolerable to society. According to Rosa Luxemburg, capitalism is not overthrown, "but is on the contrary strengthened by the development of social reforms". In a similar vein, Stan Parker of the Socialist Party of Great Britain argues that reforms are a diversion of energy for socialists and are limited because they must adhere to the logic of capitalism. French social theorist Andre Gorz criticized reformism by advocating a third alternative to reformism and social revolution that he called "non-reformist reforms", specifically focused on structural changes to capitalism as opposed to reforms to improve living conditions within capitalism or to prop it up through economic interventions. Economics Socialist economics starts from the premise that "individuals do not live or work in isolation but live in cooperation with one another. Furthermore, everything that people produce is in some sense a social product, and everyone who contributes to the production of a good is entitled to a share in it. Society as whole, therefore, should own or at least control property for the benefit of all its members". The original conception of socialism was an economic system whereby production was organised in a way to directly produce goods and services for their utility (or use-value in classical and Marxian economics), with the direct allocation of resources in terms of physical units as opposed to financial calculation and the economic laws of capitalism (see law of value), often entailing the end of capitalistic economic categories such as rent, interest, profit and money. In a fully developed socialist economy, production and balancing factor inputs with outputs becomes a technical process to be undertaken by engineers. Market socialism refers to an array of different economic theories and systems that use the market mechanism to organise production and to allocate factor inputs among socially owned enterprises, with the economic surplus (profits) accruing to society in a social dividend as opposed to private capital owners. Variations of market socialism include libertarian proposals such as mutualism, based on classical economics, and neoclassical economic models such as the Lange Model. Some economists, such as Joseph Stiglitz,