Nokia

1. Lots of things that can be improved, which translate into a lot of opportunities to perform far above average.
2. Not bad compensation.
3. There are a whole bunch of great people and connections you can find at Nokia.

1. The company is not exactly good at noticing good performance unless it's super visible to management. For example, it's hard to get better opportunities.

2. Very often, quality is a lower priority than feature work. So it's not exactly easy to do anything to make a great product.

Actually start firing people. A "no firing" policy isn't exactly healthy. If somebody succeeds in delivering a good project, promote them. If somebody keeps failing projects (I'm talking about mid-level managers), actually don't let them run new important projects.