That being said, nobody should get too bent out of shape if someone else makes more than them. If you agree to work for a salary, then live with that decision..

That being said, nobody should get too bent out of shape if someone else makes more than them. If you agree to work for a salary, then live with that decision... don't come crying to management because someone else bargained better. Bullshit. If someone with practically the exact same skillset as you is being paid significantly more than you're being underpaid for the company's own evaluation of your skillset. What you should do is say: my skills are worth x and y is getting paid that; if you don't increase my salary proportionately that I will go work for someone else at market rates. Of course, if the issue is just that your coworker is for some reason getting paid far over his skill set or market rates then they just got lucky.