yes and no.. by the time you make partner at big 4, the rationale for you swinging to buyside/pe is that its the CLIENT'S incentive... and yes generally you'd make significantly more at that level, but to be honest at partner level, the invitation to switch is based not if you have MBA, but on your relationships with clients and if they like you're work/persona.. i answered assuming you wanted the MBA to jump to a buyside shop.. if you want to get an MBA, and STAY as partner in Big 4, then yeh that doesn't add much value..CPA is still king at Big 4