Multi employer pension funds are lacking contributions because very few employers actually participate in the funds these days. Simple math - there's not enough going in to pay out. That's why most new organizing efforts don't even ask for the defined retirement benefit.
Well in trucking that means squat. This IS a trucking website after all. Not to mention I live in one of the most heavily union regulated cities in the country and i can tell you for a fact that there's plenty of non union work here.
In fact, electricians are cleaning up with the jobs that union companies can't compete with. Same with the carpenters' and iron workers. I dunno. That's just my experience.