Why hiring is caste and language ridden and we are not ashamed.

Has there been any caste proliferation in corporate hiring? 

Not sure but I feel like seeing it in my face quite often now a days. I was at ICICI bank , Jeevan Bheema Nagar, Bangalore today and I observed the official language of staff talk was mostly TELUGU. The same case at Vignnana Nagar (very close to Jeevan Bheema Nagar).
Sample one more, went to H&M at VR Mall , Whitefield Bangalore and nearly all staff talking for their internal communication in TAMIL. Pantaloons store at Indiranagar 100 ft road, nearly all staff communicate in KANNADA. 
MUJI store at VR , Bengaluru, most , everyone talks Hindi. It is Japanese retailer in India with JV with Reliance. Amazing store for innovating and high on utility products for household and even beds and shirts too. All these store guys were hired by the Delhi team , at Delhi NCR.
Just along the language lines, I observed some streaks of culture. At H&M at VR Bengaluru, staff make a fish market, they keep talking among themselves, loud and in objectionable tone, body language and rustic way. You will hate it. 
At Pantaloons, bang opposite, extremely polite, gentle looks and behavior, soft tone and non-invading body language, great sense to serve and they will communicate each step while they help you. Amazing experience.
MUJI, VR, Bengaluru, good looking and all fair and handsome and fair & lovely cool guys. Too cool and too welcoming but, they would use the taught parrot style and content irrespective what kind of customer you are are what would interest. Quite naive but very welcoming and helpful. Helpful but limited as they have bit of ego chipped on their shoulder that they are polished and MBAish hire and they look good, etc. Overtime, they will be better at what they do at store. A great store to visit. Nice folks but they need to learn a lot, a lot, a lot (yes, 3 times about the products and the story-line, its antecedents and the Value that it carries). 
And yes, the TELUGU at ICICI bank; They are soft and indulgent, thick skin and shake off if you catch them on wrong foot. But service is great. They are not used to customers wishing them , so they get a little scared. 
Store sales is not rough job of plumbing or server and network services, where you carry heavy stuff. Hire for roles and match the culture and backgrounds. 
But the managers are communal, extremely language and caste fanatic and they would keep doing it. They are backed by hidden hands of GOD (Their Managers, even CEOs) as their GOD also has a caste and he feels better with his breed and species around him. Shame!