Over Invoicing and Off shore evasion
With that profitability of Indian company goes down, money flows to foreign company and the foreign company belongs to promoter at arms length (with a partner as majority shareholder)
This is how tax evasion takes place and all the khiladis do it.
If thats not enough they deprive the domestic entity (which also has loans) so much that lead to NPAs for banks.
They also give funding to various political parties so no one touches them. They also take care of babus and bankers. more