Just go looking for a different job at all the top companies in your area. Some of them will offer you a job, and when negotiating pay, ask for 20% more than what you're making now. Simple as that.
Asking what question?
I did not understand this, and still don't.
If there's an advertised wage - $x/hr - and you know this going in, yet ask for more, I can see an interview being terminated.
If there's not an advertised wage, and I ask for something ($x/hr) I can't see how that would lead to an interview being terminated.
Then, at least you can go home knowing that you are already making what the market can bear, and you aren't leaving money on the table.