There are a lot of things that companies do to make sure no one makes you a better offer. Here is just one recent example from the tech industry:
http://venturebeat.com/2014/05/23/4-tech-companies-are-payin...
http://venturebeat.com/2014/05/23/4-tech-companies-are-payin...
I don't understand how the corporation can be guilty. If someone offers you a job with a wage that you find modest, how is it his fault if nobody else is making you a better offer?