^ I've read parts of the communist manifesto.
Many people have to understand where the idea of communism comes from. Though it may seem stupid, when marx proposed the first ideas of communism in the 19th century, he was basing it upon the struggles of the lower class.
This really explains the thought behind communism
"Marxism sees the proletariat (wage labourers) and bourgeoisie as directly waging an ongoing class struggle, in that capitalists exploit workers and workers try to resist exploitation. This exploitation takes place as follows: the workers, who own no means of production of their own, must seek employment in order to make a living. They get hired by a capitalist and work for him, producing some sort of goods or services. These goods or services then become the property of the capitalist, who sells them and gets a certain amount of money in exchange. Part of this money is used to pay workers' wages, another part is used to pay production costs, and a third part is kept by the capitalist in the form of profit (or surplus value in Marxist terms). Thus the capitalist can earn money by selling the surplus (profit) from the work of his employees without actually doing any work, or in excess of his own work. Marxists argue that new wealth is created through work; therefore, if someone gains wealth that he did not work for, then someone else works and does not receive the full wealth created by his work. In other words, that "someone else" is exploited. In this way, the capitalist might turn a large profit by exploiting workers."
So obviously, he thought that the majority of people were exploited by the rich. Thus his basis for financial equality