Wage-Labor and Capital is for all intents and purposes an in-depth economic and scientific observation on how capitalist economy works, why it was exploitative, and ultimately why it would eventually implode from within.
Some of the main topics that the book examines are about labour power and labour, and how labour power becomes a commodity. It also presents the Labour Theory of Value that further develops the distinct differences between labour and labour power. The book also examines the commodity and how the economic principles of supply and demand affect the pricing of certain commodities. Beyond that the book explores how capital and capitalism do not service any purpose other than to gain more of it, which Marx presents as an illogical method of living one’s life.