The Executive Remuneration Working Group said there was "widespread scepticism and loss of public confidence" over executive pay.
Sainsbury's chairman David Tyler and Legal & General chief executive Nigel Wilson worked on the interim report.
The report wants reform of long-term bonus schemes and more transparency.
Wilson, the working group's chairman, said: "The current approach to executive pay in UK listed companies is not fit for purpose, and has resulted in a poor of alignment of interests between executives, shareholders and the company.
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Despite the fact the FTSE all-share index of public companies was trading at broadly the same levels as 1998, executive pay over the same period has more than trebled, the report says.
The "widespread scepticism" among the public over whether executives deserve their rewards was damaging for the big company sector, the BBC quoted the report as saying.
Despite the fact the FTSE all-share index of public companies was trading at broadly the same levels as 1998, executive pay over the same period has more than trebled, the report says.
The "widespread scepticism" among the public over whether executives deserve their rewards was damaging for the big company sector, it said.
The report comes amid controversy over boardroom pay at several companies. Last week, 59% of BP shareholders voted against a 13.8million pound package for chief executive Bob Dudley, one of the largest revolts against boardroom pay in the UK.