Lagos's Informal Economy

Robert Neuwirth writes(pdf) about the critical role of the informal economy in Lagos, Nigeria:

The informal sector is the most dynamic and fastest-growing part of the city.Eighty per cent of the people who live in Lagos work in the informal economy,which accounts for more than two-thirds of Nigeria’s gross domestic product. This gives informal workers unusual economic power: about US$125 billion worth. The unemployment and the massive social upheaval and misery that would exist if the thousands of people who immigrate to Lagos every day weren’t able to find work could quickly lead to social and political anarchy. The informal sector is what holds the country together and what determines its shape.