I think it boils down th IP laws essentially. If you have patents and trade secrets and whatnot, then it becomes very hard to see these corporations transparent.

Sure it's their right to have secrets, I don't question that, but what I am saying is that after you sell products, you should not have a right to keep it secret from customers.

Like if I have a recipe of cyanide cake, I am perfectly allowed to keep that a secret, but when I start serving that cake in a restaurant, then it becomes problematic, and the clients have a right to know what they eat.

The same analogy can be applied to any manufacturer.