tl;dr

If they had to pay more to the workers it would not only impinge on prices for consumers it would impinge on Apple's profits because less people will buy and Apple want as big a cut as possible. I would imagine Apple have a pretty hefty markup on their goods. Apple like any other company looks to sell something built as cheaply as possible at the highest price people are willing to stomach. If Apple were to sell their wares at prices only marginally higher than the cost of manufacture and shipping I doubt it would be anywhere near what they actually charge for it.

It's simple really. People want cheaper electronic goods. Company X wants as much profit as possible. Why do you think they make it over there in the first place? Labour costs are much much smaller obviously. If you want to even up things then perhaps you should be asking them to make the damned goods in America and boosting US jobs instead.