Labor Unions for students, postdocs and research track faculty

While I deeply understand the desire for job security for postdoctoral fellows and non-tenure track faculty, I do not feel that unions are the way to go.  The best job security any of us has is doing an outstanding job with our chosen profession.  Tenure itself has little guarantee of job security.  As for ability to negotiate better work conditions, choosing a tenure track position ensures that one will likely work 70-80 hours a week to maintain the position.  This is the life we chose because we love what we do.  Choosing a non-tenure position is almost always a choice that results in a position that allows more control of one’s time spent working.  I am open to hearing more about other positions, but to me, I fear that unionization is not the way for any of us in academia.