In his speech at the Pennsylvania Constitutional Convention of 1873, Carey discusses the detrimental impact of interest rates on laborers and emphasizes that lowering these rates could empower the working class against capitalists. He warns against the repeal of usury laws, citing historical failures in other states that led to exploitation and increased wealth disparity. Carey argues that the current financial system favors money lenders, promoting a cycle of debt that undermines the well-being of workers and refutes claims that removing restrictions would lead to economic fairness.