Neighbours of Glencore boss Ivan Glasenberg feel uneasy about the bounty they have received.
But the to and fro unsettles potential investors in the mining and commodity giant.
Ivan Glasenberg and Mick Davis are expected to begin global tour to coax shareholders into accepting their proposed £23-billion merger deal.
Governments has a right to be paid its due by companies but excessive demands will scare off investors, says Cyril Ramaphosa and Ivan Glasenberg.
Glencore has brushed aside worries over Xstrata investors, sticking to its guns on what it called a "fair" deal for the companies' merger.
Xstrata and Glencore to go ahead with merger.
But Glencore and Xstrata executives maintain that they are merely consolidating their business.
The ANC is pondering a windfall tax as a less risky way to maximise benefits from minerals, writes Kevin Davie.
Commodities giant Glencore International said on Wednesday that its partial share float later this month could value the company at $61-billion.