Not everything is about how much extra x% wage you can pull by going to grad school. I'll admit that that was my thinking when I initially decided to do a masters but in my second year now, I realise the incredible amount of knowledge and experience I gained. After undergrad I thought I could take on the world. I was actually surprised that I couldn't get a job at the all the cool high-tech companies. Only now do I realise how dumb I was. Only now can I safely say that I can do the job that is required.