[CydeWeys]

> The idea behind unions is that an employer is not willing to lay off all the employees that are unionized (because this would lead to a sharp decline in productivity and thus KPIs).

It's also illegal.

[q-big]

> It's also illegal.

Then you find another pretense for firing many of them.

Addendum: There exist so many oblique "performance metrics" you can apply on the employee to find such a pretense.

[CydeWeys]

It's super obvious if the unionized employees have a much higher firing rate than the non-unionized employees.