Eskom said on Friday evening that Phakamani Hadebe will step down as CEO of the heavily indebted state power utility at the end of July, deepening a crisis that Goldman Sachs has described as the biggest threat to the country’s economy.

Hadebe is leaving due to health reasons, the Johannesburg-based company said in a statement published on Twitter. “It is no secret that this role comes with unimaginable demands which have unfortunately had a negative impact on my health,” Hadebe said in the statement.

Eskom is groaning under almost R500-billion of bond and loan debt, and isn’t selling enough electricity to cover its operating and borrowing costs.

President Cyril Ramaphosa insists that Eskom is “too big to fail” and the government has already given the company a three-year, R69-billion bailout. With the nation’s finances stretched to the limit, the treasury has limited scope to continue bailing the company out.  — Reported by Alastair Reed, (c) 2019 Bloomberg LP