However, I've read that as a boss, you may not want to entertain giving raises for those that ask for it, even though you may think you're cultivating the go-getters. It ends up that people feel like only those that are rewarded are those that cozy up to you, and politics will ensue.

According to the article, when asked for a raise, the best thing is to say they have to wait for their review like everyone else, and that's when you'll take note of performances.