Graham Mackay, chairman of brewer SAB Miller, added that such spending was trailing Africa's economic growth.
BBC: Davos 2013: Africa must 'boost infrastructure spending'
Johannesburg may be South Africa's economic engine, but Cape Town is where the nation goes to play.
"Africa's economic growth is creating substantial new business opportunities that are often overlooked by global companies, " it said.
Goolam Ballim, chief economist of Standard Bank Group, warned that the power cuts would reduce South Africa's economic growth.
Insufficient infrastructure spending remains "the biggest risk" to Africa's economic growth, the boss of mobile phone network Bharti Airtel, has said.
BBC: Davos 2013: Africa must 'boost infrastructure spending'
In 2013, the beads and bones of my childhood point to firm growth for Mozambique, with investment in the country's natural resources sectors, particularly coal and gas, the major driver while the power problems in Tanzania are unlikely to prevent it becoming one of Africa's economic growth stories.
Raw materials that are plentiful in Africa have been a crucial source of China's own spectacular growth while China is playing a key role in Africa's own economic development, particularly in infrastructure projects.
Most of South Africa's modern economic history springs from its underground resources.
Ethiopia, Ghana, Rwanda and Uganda have been among Africa's star economic performers recently, with annual GDP growth averaging over 6.5% in 2005-10.
Nor was the King asked about the public apology he made after criticism of his trip to Africa while his country's economic crisis was at its height.
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Under Mr. Mandela's watch, the ANC dropped its more radical economic policies and engaged with South Africa's private sector, the biggest in Africa.
The troubled firm has been accused of being one of the biggest impediments to economic development in Africa's most populous country.
Mr Mbeki's deputy, Jacob Zuma, may have triggered the rand's latest slide by seeming to sympathise with Robert Mugabe, the president of Zimbabwe, whose policies have pushed South Africa's neighbour to the brink of economic collapse.
In the first Money Programme of the 21st century, Nils Blythe examines HIV's economic impact on South Africa, and what can be done to offer hope to this country - and the poorest continent on earth More...
Turkey, increasingly turning away from Europe, is on the road to becoming a more effective force in the Middle East than is the EU. China and India are competing to replace the Europeans as the most important non-U.S. economic actor in Africa.
Even as France faces stiff new competition from China, the U.S. and Germany to capitalize on the continent's vast economic potential, the country remains uniquely positioned to respond to Africa's security crises.
"South Africa has made enormous progress over the past two decades, to the extent that it is now the region's economic powerhouse and Britain's biggest trading partner in Africa, " she said.
It is Africa's second-biggest economy, after South Africa, and the leader of the regional Economic Community of West African States (ECOWAS), accounting for roughly half of its GDP.
The Swiss-based World Economic Forum ranks Tunisia as Africa's most competitive country.
Propelled by its need to secure oil, natural gas and mineral resources to maintain its double-digit economic growth, China has become Africa's third-largest trading partner, behind only France and the United States.
One reason is that most region's of the world are forging bigger economic blocs and Africa does not want to be left behind.
In the Swiss-based World Economic Forum's Global Competitiveness survey, South Africa comes top in sub-Saharan Africa and 50th out of 142 in the world.
ECONOMIST: South Africa��s business pre-eminence is being challenged
Throughout the 7th-13th centuries they maintained a wide trade network across Asia, Africa and Europe, which made them the world's leading extensive economic power.
Last June Statistics South Africa, the government agency that puts out the country's official economic data, admitted it had greatly overstated inflation for several months because of a glitch in measuring rents.
Uganda's President Yoweri Museveni said he backed economic integration but said Africa was too diverse for one government.
China's rapid ascension as an influential economic and political force in Africa is raising complex questions concerning the security of the African continent and the future of its people.
Though the draft report highlighted South Africa's post-apartheid achievements, including its liberal constitution, sound economic policy, generally sensible new laws and free politics, it did not shy away from spelling out problems it has yet to solve: still brittle race relations, rising xenophobia (against immigrants from Zimbabwe, for instance) and the lingering reluctance of some whites to embrace the new South Africa.
Once one of Africa's most promising economies, Zimbabwe is reeling under its worst humanitarian and economic crisis.
CNN: Opposition leader threatens to halt Zimbabwe unity talks
The same fear of subjecting South Africa's economy to hard-nosed market judgments lies behind apartheid's second economic relic: regional trade barriers.
Among the issues the women will be discussing at the three-day summit are ways to bridge the technology gap, including use of the internet in business development, strategies to cope with the economic impact of Aids and war, especially in Africa, financing women's enterprises and understanding trade agreements as globalisation continues to have an adverse impact on developing societies.
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