Surley it is down to how much you get paid in comparison to the market.
If you can get a lot more elsewhere then leave your company and go and get it. (A little drastic but it is the basics of how it works) The compnay will soon realise what is happening and put the pay up. It is pure market forces.
The company needs pilots to make money the pilots need the company to earn a salary. A compromise will be reached with both sides arguing the appropriate points. (As is happening in this thread.)