Well, how I understand objectivism: You can be anything you want to be, morals are your own matter and if you are a really perceptive reasonable being, you will come to the same morals as all others. Rational acting is ideal.
That is, in my view and excuse my French, the most idiotic way of thinking possible. It takes a lifetime to understand the world around you and many people die without any enlightenment about their reality.
You will need to select some assumptions about what is good and what is bad, since you can't wait forever until you have found a rational reasonable conclusion. Also, a rational solution for the short term, is not always a rational solution for the long term. It would be VERY rational for a company to abuse their workers to the fullest for a short time, the bad effects will come on the long run,when you loose workers and experience.