I feel like that for most folks - certainly many with whom I've had exchanges on this board - their professional goal is to make money. There's a personal satisfaction element to their goals too, but the big one is money, with which (presumably) they'll be able to support a family that lives very high and such.
My goals are different. I plan to do okay financially in my life (family, kids, college educations, etc.), but I'm never gonna be a millionaire unless something really dramatic happens. And I'm cool with that.
My professional goals are to help ease human suffering and give underprivileged people the tools to enhance their personal dignity. You can definitely make a (good) living doing that, but the salaries just don't compete with the corporate world and selling widgets and investment options and such. I'm getting an MBA to give me the tools to do what I want to do more effectively and go further in my career. Agold has a point about ROI - but I'm measuring my ROI not only in financial terms, but in what I can accomplish and how many I can help.
That's the purpose of my MBA education. Tools. In a more generalized sense, I think the same is true on the undergraduate level.