1. If you think you are underpaid compared to your co-worker that does the same job as you then you should approach your manager and if that doesn’t work go higher. Support your argument with facts such as looking it up on one of the internet sites that tells how much you should make in a certain city for your position. Do the research and present your facts in a calm manner.
2. Approaching a co-worker about their salary puts that person in a very awkward position where they are not sure what to say so in fact they may beef up their salary and then the information is just plain wrong.
3. Perhaps the person has more experience and has more responsibilities. Have they been there longer than you?
4. Once you ask a co-worker their salary and then go back to your manager and say “hey I know that someone else here is making more than I do and if I don’t get what they are getting I am going to leave.” The worst thing to say because to me this is like emotional blackmail and the manager may very well say “okay see ya.”
I am not saying that there are not times when the pay scale between co-workers with the same knowledge and experience is different and that is wrong. But you need to find out why and get the facts and not involve the people you work with on a daily basis. It can only create hard feelings.
You may have been hired 10 years ago when the pay for your position was lower but now it is higher because of the cost of living, etc. A company should keep you up-to-date in pay so when someone new comes in you are on the same level. If you don’t feel this is being done you might want to suggest it.
Let me know you thoughts on this! Have a great evening!