Your post doesn't make a lot of sense. So the person you spoke to was fine with his terms and conditions but he'd heard other drivers at different companies weren't? So that seems to reiterate what I posted earlier, that although the buses come under the bee network umbrella it is still individual companies paying the drives, as in Arriva, Stagecoach etcetera. These companies would all pay differently.
You do know that before a strike is called the members are balloted? That as far as I know that ballot paper is sent to their home address and they vote on it. Nobody knows who voted which way as the vote papers have no name on them. So the days of Union reps bullying people are over.
If they are all in one union then if the majority vote to strike then yes even the individuals who don't actually want to strike have to strike. That's how democracy and being in a union works. The members actually pay to have union representation and the majority are happy to do so as without it companies could just shaft them hard, which they royally used to, which is why unions were formed originally.
So far they haven't lost any money as the strike hasn't happened yet, there is a possibility it could be called off if lines of communication are still open.
So to finish, as I said, nobody strikes on a whim. Members weren't happy with their terms and conditions and so their elected union reps approached their employers to argue the case on their behalf. The result of that meeting was then explained to the members. Whatever the company proposed was rejected so a legally held vote was called for strike action. The vote to strike outweighed the votes not to strike. It would have usually taken a number of meetings and weeks probably to get to this point. So certainly not on a whim. Indeed I think wildcat strike action is illegal nowadays and no Union worth their salt would go down this route as they would lose all their assets in a court of law.