Great idea. Why not make the code easier? Start with three letter dictionary words, then four, so on till about eight. Then restart with non-dictionary.

Now regarding knowing friend's salaries; From personal experience I can now say that it is not a good thing. I come from a culture where salary is not well kept secret and you usually know your friend's. This leads to a constant state of discontent unless a] You are on the top b] you are the type of person that can factor in intangibles well (hint: most people are not).

You might be working on a really good project, but the next day you arrive at work you will sit there sipping coffee and thinking how come my buddy is earning double working on a iFart app?