I worked as an auto parts delivery driver, and one day I delivered some parts to a machine shop. As I started opening the front door, I could hear a blaring high-pitch wining noise coming from the shop area. I got to the office and there were 4 guys just sitting with earplugs in. I asked the what was going on, and they told me that one of the machines had broken but they weren't allowed to turn off the power switch because of union rules. They had to wait until the proper union guy showed up to turn off the switch. And no, this wasn't some super special switch, it was just a 50 amp breaker. I think it's pretty clear they lost some empowerment.
I worked as an aircraft refueler in a climate that during fall would get fairly cold in the morning (20 deg F) and warm in the day (70+ deg F). One of our trucks had sensitive brakes that would often need a quarter-turn on a small screw that controlled airflow once the temperature went up (or down at night). It was trivial to do, but I wasn't allowed to even touch it because of union rules taht specified that only the mechanics union could "perform maintenance on the vehicles." So I routinely had to sit on the ramp for hours in the middle of the day waiting for maintenance to drive their truck out and turn the screw. I once suggested to our manager that we should schedule daily maintenance around noon each day since that is around when it usually stopped working, and union rules had an enumerated list of valid "scheduled maintenance" work that could be done, and that wasn't on the list, so he was powerless to do anything about it. I'm sure it didn't hurt that "unscheduled maintenance" cost us more than scheduled.
I've heard plenty more stories from friends as well. Our local plumbers union was apprently quite something. They had rules around seniority that basically fucked over everyone with less than 10 years experience and made for a sweet life for everyone over. People worked their asses off for the worst jobs with inferior pay on the hope and dream for their turn at the top end of the pyramid some day when they got their turn to sit on top and exploit the people on the bottom.
I'm not anti-union (some situations absolutely need unions to prevent extreme exploitation), but I am anti-blanket-pro-union. Some unions are really trash and should not exist.
So yeah, if you're going to say that he "lied" then I think you need to explain what evidence you have that he knew what he said was not true. If he has any experience with unions, there's a good chance he has specific situations in mind.