I am also of the (perhaps wrong) opinion that the majority of the important stuff leaks anyways, just not on a level playing field.
If your competitors know that your Florida subsidiary is running inefficiently and being subsidized by your successful business elsewhere, they can target their own operations in Florida, undercut you more than you can possibly sustain, force you to exit that market entirely, so that they can monopolize there.
Of course I realize it's possible it might introduce systemic problems that I'm unaware of.
I think the problem is that people have gotten so used to seeing capitalism from the companies' perspective (i.e.: profits good), and forgot that it is supposed to be all about the collective good. So if you think sustained high profits are good... then you have missed the whole point (the market should always be driving them towards near-zero).
