they had to hire researchers to discover this?

From the Globe & Mail...

Researchers found that, contrary to popular belief, success doesn't necessarily bring happiness but rather that happy people tend to be more successful.

“This may be because happy people frequently experience positive moods and these positive moods prompt them to be more likely to work actively toward new goals and build new resources,” said lead author Sonja Lyubomirsky of the University of California, Riverside.

If you like your job, you're probably going to do better at it... Duh!?!