Also, unionised workplaces do allow for terminating underperforming employees. It's just that companies need to try to actually help the employee first, and have clearly defined polices that lay out the process and allow the employee to appeal. The tech method of software deciding you get fired and no human can override is soooooooo much better.
I moved from one of Australia's largest software firms into a union role and got a 40% pay rise, and it's set in contracts exactly what I get paid and what increases I get. Which I much prefer than my pay rise depending on whether management would prefer to reward their friends.
Amazon warehouse pay is lower than prevailing warehouse pay used to be (amzn brought down the market rate as they're so prolific).
None of this happens at any of the recently unionized journalists I know or the long-unionized film industry members.