In the USA consumer expenditures represent 70 percent of gross domestic product, in pure 'output'. Though Economically business investment is a stronger driver, (business moves more money around), it's not the larger slice of the final pie, or 'in their hand' as such.
The point is that at any instant in time, almost all the current "stuff" is not in the hands of consumers. It is situated in the structure of production.
Read the Hayek essay I mentioned, he explains it better than I have.
Maybe I communicated my point poorly - I agree. Supply is the driver, not demand. I was just annotating the use of the phrase 'most of the money' comparing the difference in final output (as GDP), and throughput. In the context of this discussion, internally the mechanics of the economy are driven by business spending (which is most likely more than double GDP alone). But if you take final output, consumers do hold the larger portion.
