ME:LE is more expensive in Africa than in US

Just a note about South African price....I don't know this 100% BUT SA have a VAT tax system of 15%(if googlefu is correct) meaning that with VAT added you have a minimum price of 67.85$ US dollars, whereas they list it as 71.03 which could be a caused by other hidden taxes, extra costs of dealing with SA taxes, currency exchange costs, or different exchange rate used.  So it is likely not EA's fault that the game is more expensive, but instead it is your Governments tax scheme. 

Now Devil's Advocate.....

Now as for the household income goes, if you are making 6k a year, buying a 600+$ computer at a minimum to game on isn't to a smart idea....now mind you, people do buy insanely expensive PCs in US, but they are usually making a bank in money too.  Also why should Bioware/EA cut the price of a game that they worked hard to make, costs a bundle in Salaries, and marketing ,for  people who can't afford it just because they live in a different country??  Also with the advent of VPN, it is easier to confuse online markets and systems on where you live, and if you could unlock a game for half price by changing your country to a poorer one in the world, I guarantee you certain people would do it....