Uber charge

[exnihilo]

Sure there is. Goods are not tied to the time they were made, as a rule. There is no overtime, no double time, not holiday pay. A widget made during the week could be sold New Year’s eve. Time driving on Wednesday cannot be done the following night. That is the specific problem here. The Uber drivers had to price what it was worth to them to give up their fun to serve others having fun on that particular night.

You are talking about the concept of opportunity cost which applies just as much to non labor resources. But a physical good can reflect different labor costs. A widget could be produced at a factory 24 hours a day. The factory owner might have to pay more money for the night shift. Thus the cost of an individual widget would vary. Of course it isn’t typical that the manufacturer charges different prices for the good. But the fact remains that the cost of the individual good reflects the time it was made.