The issue of entrepreneurs facing tax terrorism - raised first by Cafe Coffee Day promoter VG Siddhartha before his death - has now been reinforced by former Infosys director Mohandas Pai and Biocon chief Kiran Mazumdar Shaw. In an interview to NDTV, Mr Pai said "tax terrorism is the biggest threat to the ease of doing business in India" and despite the government's promise to end it, "unnecessary tax litigation is still rampant" which is not allowing the country to achieve its potential.