I can't think of any good solution for this. The only way to get what you believe is a fair salary is by negotiating that directly with your employer or switchi

I can't think of any good solution for this. The only way to get what you believe is a fair salary is by negotiating that directly with your employer or switching to another job that pays better. Unless you are an executive, don't expect someone to give you huge salary increase for your performance. At best, even when your manager is very satisfied about you, (s)he is limited to the percentage range that is defined by HR for salary increase. Even if you get better title, the salary increase is still limited.