Value is a subjective determination made by market actors, not an inherent property of goods and services. This difference in valuation means both parties can "win" in an exchange, and exploitation is not inevitable. A loaf of bread is not worth the price asked. The price is an offer. The seller values the asking price more than they value the bread. The buyers, if any exist, value the bread more than the money exchanged for it.
If there are no buyers, the seller must adjust the price, or determine whether the market has no need of hif their goods at all.
Labor is not a special class of services. Labor has a market price depending on its skill and quality. Price controls have the exact same adverse effects on the labor market that they have anywhere else.
No one is owed a job. Yes, some employers are corrupt and abusive. So are some employees. The solution is not legislation. And again, corporations are creations of the State, not the market.