To make you feel better, and just that purpose alone, let me tell you this:
After you graduated from top school's PHD program, going to a management consulting firm is not a bad choice, but NOT the best choice. She has to start from ground zero (meaning she may have to go back to B school after a few years) in a management consulting firm. if she stay in Chemistry, she could live an easier life working for some big firms or go on with her acedmia career, both are more relaxing, higher social class and just about the same pay as a McKie consultant.