Let's say you own your own business. I come to you and say that I will not let you operate your business unless you give me money. You resist, so I bribe (sorry, give donations) to my favorite politicians and get them to pass laws saying that you must indeed give me what I want in order to operate your business. Then, periodically, I come back to you and demand that you give me more whenever I want, regardless of what that does to your bottom line. In my world, that is extortion. It is wrong and immoral. It is also a union. Unions by their very nature are evil.
If I don't want to work for you for the price you offer, I'll give you a counter proposal, if you don't want to pay it, we agree to part ways. You hire someone else who fits your needs and I go to a job that will pay me what I am worth. If no one is willing to pay me what I want, then I am obviously not worth what I think I am. If the value I add a company is as high as I think, then they will hire me out of their own self interest. If my value is not as high, then it is bad for the company, bad for the consumer and bad for the economy for the company to pay me more than I am worth.
Have you ever noticed that unions are almost invariably for jobs that any trained monkey can do? Get a real skill set and you pick the company.