WPP Chief Executive faces another shareholder rebellion over his remuneration package. Pirc, an influential shareholder advisory group, has called for a vote on Sorrell's pay at its AGM later this month. The focus for concern is a long-term incentive scheme that was altered last year but is still too generous, according to Pirc. The group said: "Analysis by Pirc leads us to conclude that it is excessive and dividends continue to accrue over the performance period (five years) on the number of shares that vest."