No, they call it the 'divorce course' for a reason.
An MBA will make you more employable, and seems to carry more weight in the USA than anywhere else in the world. But it won't make you rich.
Only hard work and smart choices will do that.
Bill Gates, Larry Ellison, Steve Jobs, Michael Dell and Sir Richard Branson to name a few.
Having an MBA to gaurentee getting ahead is like having a nuclear weapon to win a war. Just naive.