You're looking at this the wrong way. There is no single "value" for anything.
When you walk into a coffee shop, chances are you'd rather have a cup of coffee than the $2.50 in your pocket. Conversely, the coffee shop owner, having plenty of coffee on hand, would rather have your $2.50 than hold on to 16oz of his coffee. You value 16oz of coffee at $2.50, or more. He values 16oz of coffee at something less than $2.50, and presto, we have a transaction because you the the coffee shop owner place a different value on a single cup of coffee at that time and at that place.
If you walk into that shop and see 12oz of coffee at $25, you walk out. If you offer $0.25 for the coffee, you're asked to leave. That's how markets work. Each side needs to see enough value (not necessarily the same value) to engage in a voluntary transaction. If either side does not see value, then the transaction doesn't happen.
Back to the point, by artificially elevating the cost of labor, fewer employers will see value in higher priced, low skilled labor. This is fundamental, and there's no escaping it.