Whatever the legal framework, if you don't tell anyone an idea, then you can keep it. If you tell people, then you have to negotiate if you don't want them to run off and do it too. If your idea needs lots of capital and labour to get it off the ground, then you always have to negotiate anyway, just to do it in the first place.

For me the question isn't, 'how do we protect the intellectual property of the people who do research', because the term intellectual property is a legal one that varies massively in time and geography. I would probably be more inclined to ask the question 'how do we make sure that the people who do research get paid really well and are really well resourced', and work from there.