As far as I know, academic institutions have a pretty large budget for subscribing to journals. If a member (prof, staffer or student) wants access to a certain journal that isn't available, the librarian can arrange for it.

So in terms of accessibility to each other's scholarly articles, scientists in academia or larger industries don't suffer from a lack of collaboration. Since this covers most practicing academics, there is little incentive for the scholarly publishing community to change.

That said, there are many Open Access Journals out there - I guess you're not alone in your sentiments that science should be collaborative.