Varnish PR?

Toni has a great post about PR as the 'varnish'.
He quotes Sir Martin Sorrell's view of responsible corporate behaviour as a coat public relations varnish.

Toni says

Maybe it would be useful if the CEO’s of the many H&K’s and B-M’s which form the roster of the conglomerate’s pr firms and contribute to his personal well-being, demanded a public apology.

Hear Hear!

What does WPP really own?