The country's second-largest software services company said the increase in Rao's salary followed a comprehensive survey of best practices and benchmarked senior management compensation with key Indian and global companies.
The eruption of a fresh row between some founders and the top management saw the stock take a beating with a fall of over 1 per cent in an overall bullish market.
"This (hike) could go up to 33.4 per cent in year 4, assuming similar grants are made in subsequent years based on company and individual performance," Infosys explained.
Soon after shareholders voted for Rao's pay hike, Murthy opposed the proposal saying near "60 per cent to 70 per cent increase in compensation" to the COO is "not proper" when most employees got just 6-8 per cent hike.
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Murthy had abstained from the resolution on raising Rao's salary. Only 24 per cent of promoter shares voted in favour of the resolution while the rest abstained.
The proposal was placed before the shareholders and the recommendations have been approved by 67.5 per cent of them while 32.5 per cent voted against the proposal.
Among non-promoters, 24.5 per cent institutional investors and over 67 per cent non-institutional shareholders voted against the proposal.
The fresh rift comes barely two months after a similar face-off between the founders and management on issues like CEO salary hike and severance package to former employees.
Infosys said it viewed Murthy's statement as "important feedback" and will continue to work with all stakeholders to ensure long-term interest of the company.
Explaining the increase, Infosys said the cash component of Rao's package had decreased by 10.6 per cent to Rs 4.6 crore from Rs 5.2 crore.
Balakrishnan, who served as CFO, said there was a need for reconstituting the company board as the golden standards of governance and value system that Infosys was known for, are "being decimated under the current leadership".
Pai, on his part, said since Infosys is an Indian company, it should follow Indian standards for compensation.
Murthy, along with Balakrishnan and Pai, has previously publicly aired his views on what he refers to as falling governance standards at Infosys.
The tussle also saw whistleblowers sending letters to market regulator Sebi alleging irregularities in Infosys' USD 200 million acquisition of Israeli firm Panaya.
The company, however, had refuted all allegations, saying these are "misleading". Sikka and Seshasayee had also called a press conference to explain the company's stand on the issues pointed out by the promoters.