Every union member I know that crossed the picket line in 97, is sitting on a big heaping pile of stock they received as a bonus for the last 12 out of 13 years. See Ups promoted them to full time management and they cashed in.
As far as my hands go, I like what's on them. It's reminds me how people really are. It reminds me not to trust anyone.
At all times there are duplicitous people who are nominally members of the Local Union, but who are really management wannabees who's real loyalty is to Management. A strike forces their hand when UPS demands they "out" themselves and cross the strike line, just like any Management employee is obligated to do. How can they refuse UPS in its time of desperation, and ever hope to later be among the Chosen?
It's unbelievable that someone can fly under false colors, even attend confidential union meetings, then switch sides at such a crucial time. But as unethical as it is, it's perfectly legal.
Of course, such a union member would be fined. And it's doubtful he would last long as a Supervisor. One side would hate him; both sides would distrust him.
You say you know such people who are still with the Company thirteen years later? Surviving the shark-infested waters of Management for thirteen years is quite an feat, even for someone who is respected. All the harder for a defector.