Work that promises to improve the world but doesn't take real action is 'infecting' the industry, Unilever CEO says.
Sale of Droga5 to Accenture will help it stay relevant, founder says.
Changes are part of collaboration with Unstereotype Alliance.
Costs are reported to be for personal expenses over several years.
Veteran marketer will leave in May 2019.
Sir Martin Sorrell regrets not simplifying WPP faster in terms of client-focused work, more country management and making sure this is underpinned by digital.
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