One cannot understate the pure evil of labor unions. They extort money from the workers (in the form of dues) and apply it towards supporting marxist and socialist political candidates who are committed to destroying America and all it stands for. On top of that, the unions tell their workers who to vote for and intimidate them into holding signs and otherwise volunteering for the campaigns of Democrats.
Unions reward sloth and destroy anybody who wishes to work hard and do a good job. They promote socialism by paying everybody exactly the same wages for the same job. If somebody calls out sick twenty times a year and drinks and smokes weed on the job, they get paid exactly the same as the poor sap who comes in every day, works hard and goes the extra mile.
In fact, unions HATE people who work hard and they seek to root them out of the workplace. They even have an expression to discourage others from working hard: "Don't kill the job." Because they know that if people do a full days work, the companies they are leeching off of might realize that they don't need to have quite so many workers on the payroll. So basically it takes seven men to dig a hole, one to hold the shovel and the other six to lean on their shovels and watch.
This is no exaggeration either. The labor unions, where they are permitted to exist, suck the blood out of our industries and like the parasites they are, they eventually destroy the host.