Starting in '73 I have paid dues to Teamsters when the job required it, and at the end of job pulled a withdraw card. And on more than a few occasions, when a driver said he wanted to go union, I sold him the truck, owner finance, pay as you work it. (Most that bought my old junk are still driving their on truck, some more successful than I ever was) For 2 years, before it was noticed, the "Proud to be Teamster" sticker, they required me to run on tailgate, read "I Bribe Teamster" (Issue with company leased to, union "if you was a driver we could... but you own the truck so, be sure you get the dues in next month).
Now somebody mentioned unions encouraging "class warfare" between workers and management. Fact is, unity between workers is the only defense against management, as the representative of capital in a country where capital controls the government. (Court just ruled the US government can target a working person for death, and does not have to give that person reason for the target so he can prove he should not be killed.)
Talk about the danger of parking brand x in brand y factory parking lot. I have discussed this with UAW members. Ask what percentage of your income do you spend on car? A better place to slice tires, IMHO, would be cars with UAW stickers in Walmart parking lot.
Complaining about the taxpayers picking up the cost of past retirees? Think about that for a minute. Yes, the retirees are getting paid buy the Gov, but not the total of what was promised. OTOH, Management promised to pay what the company could not afford. Can you say the management was doing a good job, earning their pay? But AFAIK, the upper management got everything that was promised. But it is the workers fault?
Workers ahead of loan holders in bankruptcy court? My issue is this so rarely happens.
Are some unions corrupt? Yes, but as a country we celebrate the corrupt.