The Guptas and Duduzane Zuma resigned from Oakbay Investments and Oakbay Resources and Energy to facilitate the sale of the Optimum coal mine from Glencore to Oakbay, the Democratic Alliance (DA) claimed.

Their resignation “is an insult to the intelligence of the people of South Africa … to claim that they have done this for their employees,” James Lorimer, DA shadow minister of mineral resources, said in a statement.

“It is an exercise in smoke and mirrors to protect their assets and profits; nothing more,” he said.

“A number of questions have already been raised about political influence in the Optimum deal and the extent to which the Guptas have used political connections to facilitate the transaction,” he said. “Tainted by charges of corruption, the sale may have been in jeopardy with them at the helm.”

Lorimer revealed that Investec, Rand Merchant Bank and Nedbank hold R2.7bn in Optimum’s debt.

“One can therefore only suspect that the deal would not have been approved while politically exposed individuals are directors of Oakbay ,” he said. “This raises questions as to whether the banks themselves pressured the Guptas and Zuma to step down.”

The banks in charge of Glencore’s debt voted for the sale to go through.

“The creditors got the requisite majority,” Piers Marsden, who has been managing the so-called business-rescue process since Glencore sought bankruptcy protection for Optimum in August revealed.

Reports revealed some individuals hold board positions on both Oakbay and Eskom, which raised the question of state capture, an allegation where the Gupta family uses its friendship with President Jacob Zuma and his political network to influence certain business deals.

Lorimer highlighted that the Guptas will remain shareholders of the company and “continue to  profit from lucrative Eskom tenders secured by Optimum”.

“They will also, no doubt, be replaced by puppet directors who will do anything at their bidding.”