When I started working in Europe, one of the most shocking this I learned was that you basically can't be fired under a normal work contract. I mean in theory you can, e.g. with group layoffs, gross negligence and so on, but it's illegal to fire person A and hire person B to do their job. You have to basically dissolve the job the person A was doing and when you hire the person B, they must not be doing what the laid off person was doing or else they can sue you.