"Greater transparency on executive remuneration will promote investor confidence ... The granularity of disclosure will act as a self-regulatory tool, compelling managements and boards to make more considered decisions on executive compensation," the report by proxy advisory firm IiAS said.
Besides, the Institutional Investor Advisory Services (IiAS) said that corporates should cap compensations and also provide a "reasonable range within which the board can exercise its discretion".
Advocating the need for high component of "variably pay" in the overall salary mix, the report said that such a system would help in linking performance and pay.
The proxy advisory firm in a release said that "three resolutions relating to executive compensation presented by Tata Motors" were defeated.
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"The outcome of these resolutions throws light on a related issue: disclosure levels regarding executive remuneration," the release noted.
Earlier it was disclosed that salary proposals for Tata Motors' executive directors -- Ravindra Pisharody and Satish Borwankar -- and Karl Slym (late managing director) have been rejected by the shareholders.