In the free market system, the customer holds all the power. They either choose to buy or not. This holds true whether the customer is someone looking to “buy” labor, or someone looking to buy a product. The employer wants to find the best bargain just as the consumer does. The employer has to provide the best bargain when selling his goods and so must the employee offer the best bargain when trying to “sell” his labor.
This really isn't that difficult.
In my experience, anyone that says: "This really isn't that difficult", does not know the nuts and bolts of the subject. Practically EVERYTHING is "difficult", complicated, once you know the details.
re:The employer has to provide the best bargain when selling his goods and so must the employee offer the best bargain when trying to “sell” his labor".
Where does "the employee offer the best bargain when trying to sell his labor", when the employer, to provide the best bargain, moves to China?