In "Up The Organization" Avis' Robert Townsend suggested the following plan. (1)Quit. (2) Immediately apply for your old job and suggest the salary you would be happy with.
If you are right the company would be stupid not to rehire you at the new salary since the cost of retraining someone else would set them back a bunch. If you are wrong, well now you are free to look for that better job that you believe you deserve.
You have it quite right. Whining socialists. Of course Wal Mart can pay more, and for their better employees I'm sure they do. So work harder, be worth more, then follow Townsend's advice.