That's not a lie, it's a reasonable hypothesis. The Teamsters have multiple pensions that are in serious trouble, and the only real options to bail them out are a big infusion of cash from the government or new employee contributions. Maybe it's unlikely, maybe they swear on a gilded copy of the NMFA that they would never do such a thing, but it's not impossible. The fact that they are going after the looooooong odds at the two biggest non-union LTL carriers supports the idea this is all about the money and not about us poor, abused workers.
And even though we've covered it over and over, I'll go ahead and repeat it. You are not in control, your bargaining agent is. If at any point they want to stop taking your advice and direction, they can. It's not a lie to say that's a possibility.
Using the word "lie" is an appeal to emotion - it furthers the cause of damaging the credibility of your opponent, so it's very popular on all of your posters, banners and headlines. What you're describing isn't a lie.
Hey now, let's have some respect for our fellow drivers. Maybe you've forgotten already:
If you're going to be sanctimonious, at least be consistent.