You don't. At least not by every job. It's more like 99% could get a job without a MBA. If everybody will be a master, everybody will also want to get a higher grade in his job, which couldn't work, so you need normal developers as well.

The only thing you will get a lot less than a MBA. When you would get the job of a MBA you will mostly get the same money he will get even when you have 5 years of experience.