Both the value of the worker and this situation both ignore the supply side. A $5 bill is worth $50, assuming there is a supply of people willing to pay $50. Likewise, a worker is only "worth" $50/hour if there is a supply of people willing to pay them $50/hour. If they're working for $5/hour, there's a good chance the supply of people willing to pay them $50/hour is slim to none. I would argue at that point that they are actually worth $5/hour, and $50/hour is a fiction like saying my shares of Hertz are worth $10,000 a piece.