As most actors, producers, writers etc. in this movie are young, they have strong incentives to work well in order to get further well-paid jobs. Simpel as that.
The 'they are all in for the money' point seems to imply the fear that Trek gets 'sold out', doing a large-scale blockbuster which betrays what Trek is about to reach the largest audience. But as folks like Orci and Lindelof are fans, I can't understand this fear. People who never did Trek and fans in the production team are a promising mixture, the best of both worlds. Remember whan Nick Meyer did and how ENT changed once old fans like Sussmann or the Reeves-Stevenses came aboard?