If you think she only did it for the money, you haven't even 'scratched the surface'. [=there are many other factors, reasons, etc., involved]
Despite the 'surface' differences between the two candidates, they are very similar in most ways.
The tension between them is beginning to 'rise to the surface'. [=it is becoming easy to see]
(..) All right, stop. Lucius, you'll kill this man, and yourself... and you'll barely slow them down. Go on, then. Do your work. Take them up to the surface. People of their status deserve to experience the next era of western civilization. I've been to half of Daggett's cement plants and log locations (..)2012 The Dark Knight Rises