If you take a look at what I said again, it was nothing more than "the first step in this process is necessarily getting rid of (artificial) barriers to entry." You asked for some of those, I gave them. I made no value judgments on whether those barriers were good policy or not; I simply stated that they were barriers.
In response to your earlier point about the EPA - no Big Business wouldn't, because they have the resources and infrastructure to maintain compliance. That gives them a huge advantage over potential smaller competitors. Most of those businesses have a large part in writing the regulations, after all. The problem is, along with safety regulations, that it's not a political winner to argue against unnecessary regulations for their anticompetitive effect, if the alternative is a perceived laxity on safety or environmental sensitivity.