In a general sense, I agree with you; large corporations show a disturbing lack of collective morality.
But it needs to be understood, especially with today's transportation and communication capabilities, that large corporations are more protected from across-the-board business legislation than not. Indeed, often lobbyists or other corporate affiliates push for an increase in order to protect themselves from smaller newcomers who would be able to beat them out through innovation or superior marketing if not for the cost of implementing confusing and often unnecessary or non applicable regulation.
As for labor rights, I'm right on board with you there, but also realize that standards were improving on their own before government intervention, and that government intervention today is precisely what keeps wages low.
Let me pose this question to you; what would happen today, if a capitalist decided to start up an auto factory in the U.S. designing ultralight geodiesel hybrids that got 200-250 mi./gal? What if, instead of a single capitalist, we were talking about a group of individuals interested in starting a worker-owned company, just take take the moral ambiguity and the unions out of it. Do you think that would be possible? Do you think that, if it is possible, it would be harder or easier to do because of federal legislation?
Federal regulation oversteps its bounds and prevents innovation and competition. If it must legislate business, it should restrict itself only to public business (businesses with public stock), and leave private business regulation to the 50 sovereign states.