Making more money does not equal a higher refund. I am not sure why in this day and age people STILL don't understand what a tax return is, and how a tax refund is a function of it.
When you earn more money you pay higher tax rates, you are eligible for fewer credits, etc. but even that really doesn't have all that much to do with your refund. Your refund is the amount of money you paid in that exceeds your liability. If you had paid more, then you would get more of YOUR MONEY back when you reconcile your tax due with your pre-payments.
