I joined a union and organized the election of a workers council at my workplace.
Union dues are 1% of my salary.

In the past 5 years, we managed to enforce:

• the right to work from home
• 20% pay for the time spent on call after hours, plus 1 day paid vacation for each week you're on call (so I now have 42 days + unlimited sick days)
• a company car for on call duty, which you're allowed to use privately, too
• work phones for every employee (instead of having to install the company MDM on your private phone)
• convertible desks for everyone
• and a substantial pay raise