The likes of Mark Shuttleworth, Cyril Ramaphosa, Allan Gray and Tokyo Sexwale and others are at the vanguard of an ever-growing philanthropy movement in Africa.

FORBES: Five Notable African Philanthropists

"Most people start with the index, " Allan Gray says.

FORBES: Unsung outperformers

But local Unison secretary Gray Allan said the conditions had been imposed without union agreement by effectively dismissing workers and employing them under new contracts.

BBC: NEWS | UK | Scotland | Tayside and Central | Staff stage walkout amid pay row