Not really. They said consumption AND labor. Stocks are capital, and their profits come from underpaying workers for the value they produce through labor. Inherited wealth is also acquired through and stored in capital.

In addition, the government is an essential part of capitalism, as it protects owned property more economically than the private armies of feudalism. Government spending programs that give the rich money are paid for by political donations, but the actual profitability is hard to quantify.