That's not actually true. If you're a skilled worker, you're livelihood (and security) comes from your skills. This is the core issue with unions for skilled people. If you work hard and move around, you can make great money and be secure without a union. So why unionise? That's why there is no union of doctors or investment bankers...
Imagine you're a dev at amazon, and you get 100k basic and share options worth another 100k. If you throw in with the union, you risk your job. And if you win, they get 2usd an hour more. And your 100k of share options is worthless. How does that sound like a good deal?
Imagine you're a dev at amazon, and you get 100k basic and share options worth another 100k. If you throw in with the union, you risk your job. And if you win, they get 2usd an hour more. And your 100k of share options is worthless. How does that sound like a good deal?