Is this from a fancy school? Most MBAs I know are working jobs that have nothing to do with their MBA, making less than $50,000. The only people who benefited from it are guys who did engineering + MBA.
No degree guarantees you a job, there's always work and ambition and a lot of luck and timing that factor into anyone's career success.
But yes, if you plan to go to law school solely because you want to make money, it's not worth it unless you go to a top school or graduate at the literal top of your class.