I'm new in the EMS field but have a lot of experience dealing with unions. I use to work at a machine shop and did a lot of work for GM (UAW). The UAW is what is running Detroit into the ground and the reason why I will never in my life own an "American" vehicle again. I've seen the quality that goes into GM products and it is absolute crap. I have seen work that goes into Toyotas, Hondas, etc (which aren't union) and the quality is amazing. Also the pay/benefits is very similar to UAW but the main thing is that you are held liable for your screw ups.
I wouldn't mind an EMS union but the union would have to realize that the company needs to be protected too and to not protect the sorry employees. The best example I heard for how a union should operate is that you have an airline pilot flying from NY to England. A few hundred miles out the pilot notices a warning indicator for what is probably a faulty switch but the pilot turns the plane around and comes back to have it checked out. Turns out some water just shorted the switch. But the company is upset that this pilot delayed passengers and cost the company a lot of money and want to fire the pilot. THEN the union should step in and protect that pilot.
But if you have a pilot who is constantly late or does something dangerous and the union agrees it was dangerous, then they need to stand behind the company and not protect that worker.
The problem is a union that operates like that only exists in fantasy land.
That's just my take of course