The fruit of labor is always measurable change in the condition of something; the money is compensation therefor, not the fruits thereof.
Money is only and always simply a means of exchange.
The fruit of labor is measurable, but how? In the enjoyment you get out if it? Okay. But if you’re not also the consumer, in the smile on the guy you sell it ti’s face. Yes, but that’s not very interesting to you. It is commonly measured in what you can exchange for it, through the medium of money. That is, prices.
But money has its own price. Because of variance amongst people in time preference—some save, others spend—supply of and demand fir it vary. It is silly for us to pretend like money is sterile and bears no fruit. There is a market for money just like there’s a market fir apples. The proof is that people are willing to buy it.