From issue to issue I hear about various forms of employees making themselves heard but it is REALLY hard to jive with what that means.
We've seen Google employees post about some ideas that seemed to be genuinely popular (measure that how you will...) but later ideas or advocacy were reportedly far less supported by the general employees, but news reports seem to reports that don't know / specify make it sound like issue to issue "employee anger" is somehow uniform / equally supported each time.
I've worked enough places to see a popular topic / concern taken by the same employee advocates into new topics that very much were not popular.