Since beginning, the ideology of liberalism has been under continuous change. Traditional or classical liberalism sometimes directly advocates in support of capitalists or sometime talks of favour to capitalists in subdued tone. It also advocates for private wealth besides need of social unity and as such, this thought serves the good to capitalist. 

In this sense, this thought could be a revolutionary one and hence becomes a voice in support of capitalism. On account of being supportive to individual wealth and capitalism, there exists a groups of poor persons. Besides, certain social and economic disparities do corrupt liberalism and it now becomes synonymous to capitalism. Scientific marxist revolution came into existence as a counter to liberalism supporting capitalism. Marx talks about equality in life in place of inequalities . To achieve this goal, he talks of struggle for change.

In order to check the increasing effect of Marxism, liberalism changes its form and support a public welfare state, wherein it talks about restriction on private wealth and levying tax on capitalists.

Traditional liberalism advocates free trade in economic field and capitalism based on agreement. It is also called negative liberalism because it restricts on control or intervention on capitalism. Because of this only, this doctrine in criticised that economic society of liberalism is common society which takes care of the aged persons and overlooks the interests of the common man.