Zuma would go to any length for the Guptas, according to investigators.

Corruption investigators have decided that South Africa's former President Jacob Zuma would do anything the wealthy Indian-born Gupta family wanted him to do from the start of his first term.

The "State Capture" commission, which is probing charges of widespread corruption in South Africa during Zuma's nine years in power, claims that the former president put the interests of his corrupt allies ahead of the countries.

It further claims that the Guptas saw Zuma as a person whose character could be utilized against the South African people to achieve their commercial interests.

The fourth portion of the commission's investigation, which was issued on Friday, confirmed these damning conclusions.

The notion that the Guptas purchased their way into the state's most powerful organs through Zuma has been central to the commission's findings.

Its most recent investigation exposes how Zuma, at the demand of the Gupta family, appointed and removed key ministers in charge of the country's economy.

It details the firing of a finance minister for refusing to follow the Guptas' requests, as well as the subsequent appointment of two ministers who were loyal to the family's interests.

Jacob Zuma's son Duduzane Zuma (R) used to work for the Gupta brothers

Zuma, who took office in 2009, and the Gupta family, who arrived in South Africa in 1993 just as white minority rule was coming to an end, deny any wrongdoing.

Zuma was sentenced to 15 months in prison in June after refusing to comply with a court order to testify before the committee.

Its fourth report also outlines a network of corruption at the national electricity firm Eskom, culminating in the Guptas installing key members of the company's executive.

Because of bad management, Eskom has had to accept repeated taxpayer-funded bailouts, and South Africans are now enduring rolling blackouts.

The country's law enforcement agencies should explore criminal prosecution of the former Eskom chief executive and chief financial officer, according to the report.