This team building isn't an issue though you sign them to confidentiality contracts that can't be broken. You need entire teams of research scientists to build a new drug and how many times have their secret formulas been released?
I did a doctorate in Cancer Biology with a concentration in drug development and there is NO way those contracts can be broken, they have teams of lawyers that go over EVERY tiny detail, and spilling the secrets not only will cost you everything you own, but a CRAZY jail sentence. Corporations cover their tracks, and they have a system that leans heavily in their favor. So this talk about someone talking isn't really an issue, unless the person had absolutely nothing to lose. It is impossible to sell the idea, story or memoirs, because the company or publisher stupid enough to buy it, is held libel for the breach of corporate secrets, which not only has heavy fines but is a huge criminal issue for the company. Even if there is a legitimate health concern, like with big tobacco, they issue gag orders galore to silence people.
Mr. Reese trying to blackmail Wayne was a slip up on Lucius and Wayne's part for not covering their tracks, a slight oversight. However, we didn't see anyone who actually built/worked on the Tumbler come out and talk about it. How many military secrets ever get leaked in regards to R and D? Does anyone know the true meaning of Area-51, besides a bunch of conspiracy mumbo jumbo? Try talking to a person that works there? Good luck finding anyone willing to even acknowledge they work there that isn't a discredited wack job.