hmm. no. i believe there isn’t enough tinfoil to go arround for everyone on the planet.
how does it work then ? how do you know for sure that each employee in the company sees all the code at any given point in time. have you heard of Compartmentalization ? i would imagine it’s not difficult to do in a multi-million-dollar-proprietary-software-company.
same can be said about patent holding hardware manufacturers. each employee works on a different piece of the puzzle not knowing they could be creating a mass-destruction-weapon. but let’s not get too caried away here 