I have mixed feelings about the role of unions. When I worked at an aluminium plant in South Wales I had a few run ins with the main engineering union there (can't remember which one it would have been) who thankfully didn't strike very often. I say that because the plant was already bleeding money and it takes quite a while to shut the plant down and bring it back up to operating status.
I do understand that (some) unions are concerned about job losses but sometimes I wonder if their actions are counter productive.
Anyway, here is a recollection of one of my brushes with the union rep on site who knew I wasn't a supporter of them bringing the plant to its knees. It happened when there were out on strike and in order to get the keys to the computer room (where I was a computer operator) I had to cross the picket line to get to the gate house. Having seen me cross the line the union rep was waiting in the gatehouse expecting me to be trouble.
I asked the security man for the keys to open up at which point the union rep (who was expecting trouble from me) said something like: BBB (Brother Berkshire Bugsy) Please can I ask you to show solidarity and not work today?
At which point I said (to his surprise) Yes, no problem I will leave site straight away and return when the issues are resolved.
Mr. Union Rep was obviously taken a back by this and shook my hand and said "Thank you BBB - your support, whilst unexpected, is appreciated"
My reply: No problem - just be aware that I was due to run the outstanding payroll today which will now have to wait until the strike finishes.
With a not insignificant portion of humble pie the keys were passed to me in double quick time.
I could right a book about industrial relations in South Wales in the 1980s but suffice to say the miners strike was very bitter and I believe there are still communities where rifts have not healed to this day
I clearly remember striking miners and supporters dropping stones from the M4 bridges onto the cabs of lorries that were being used to ship coal whilst the rail unions were out in sympathy.