I think you cannot compare two totally different countries and their wages as the living costs nowhere near similar in this two and therefore cannot be compared.
I compared Nigeria with South Africa, America was mentioned there because that's the county other Africa countries wish to be like. In 2017 Nigeria was the biggest economy in Africa and their minimum wage was still lesser than South Africa that came 2nd. Also many Africa countries are paying their works higher than what Nigeria pays her workers.
Back to Nigeria though - what do you mean by "shut down the economy"?
Nigeria Labour Congress overseas the running of all four organisation that runs the economy of the county which means if they go on strike every other section will follow to understand how Nigeria Labour Congress works read her
wikipedia page