You've had no dealings with them, yet you feel qualified to tell them what actions might be in the interests of their members?
Well done, that man!
Don't you get it? The membership, like the union, are between a rock and a hard place. They're looking down the barrel of another ten to thirty thousand compulsory redundancies. As is usual when large employers are looking to "lose" staff, management are pouncing on every tiny disciplinary or procedural infraction, and attempting to use those issues to lever people out of their jobs with out having to pay redundancy. Very few workers are going to stick their necks out beyond what they already do, because frankly they want to keep their jobs as long as possible. Working in a job that destroys your soul still seems better to many people than being on the other side of the jobcentre counter. All this has been very obviously the case for the last 3+ years.