I don't think the metaphor works because a job is an agreement to exchange labor for money, not a service or a product that you purchase. But for the sake of argument, let's grant it. If a restaurant gives you a peanut butter sandwich instead of a steak, you can go to another restaurant that provides better service. Similarly, if an employee doesn't like the terms set by their employer, they can move to a different company, or start their own company on their own terms.