[Trisquel-users] Why does no insider disclose the non libre computer software?

[svhaab]

How do chip manufacturers accomplish to keep the pieces of software that runs  
their hardware secret?
Who, how and how many guard the secret parts of software on hardware? Do we  
know how it is organized? How do the companies manage to keep their secrets?  
Do very few have the source code? Are they highly paid, which make them  
loyal? Are there any articles on the subject? I have not heard about one  
piece of windows source software being leaked.
I asked the free software foundation these questions and got no answer. What  
do you know?