Concrete Finishers are skilled - no doubt.  That doesn't take away from the immense training and certifications that a Mix Driver has to go through learning the trade.

Furthermore, my understanding is that generally the laborers that are picked up don't even have to be drug tested so you end up with folk that could not pass a piss test and drive a car much less a 90,000 turning burning cement mixer.  

Say I'm wrong - either way, we are all in this together!  Unions unite!