KPMG Manager interview questions

I applied through a recruiting firm, a senior recruiter from the firm did the first round of screening and find my profile suitable for the role. They submitted my profile to KPMG. After following up to find out about the recruiting process I found out that KPMG have only shortlisted people form IIM A,B and C. I have an MBA from leading Ivey league global business school and years of expecting with global MNCs. I was under the impression that global consulting firms like KPMG would be more open and rational in their recruiting process, but because of such shortsighted and somewhat biased screening process that they have, they are missing out big time on people like myself and others who could add lot more value to their clients and organization.