You can search for Tata group role in 2G scam. I don't know what is current status of case. But Tata group was lobbying with then Telecom minister. One example

You can search for Tata group role in 2G scam. I don't know what is current status of case. But Tata group was lobbying with then Telecom minister. One example of probe into Tata conduct: http://www.firstpost.com/business/corporate-business/2g-scam-ex-niira-radia-firm-under-scanner-as-cbi-probes-tata-realty-unitech-deal-1984347.html http://www.firstpost.com/business/corporate-business/2g-scam... But you can find a lot about this case. The point being Tata or anyone are not absolutely clean.