Think about how strange it is that not just your macbook, but almost everything you can buy has been manufactured on the other side of the planet, can be transported, imported and still be sold cheaper than you could produce it locally.
It's a bit like selling your birthright.
Also, don't forget that those workers abroad are usually working in circumstances that local authorities would not tolerate.
A nice bit of backstory about moving production to China.
A few years ago, rubbermaid was forced to raise its prices because of the developments on the raw materials market.
Wall-mart refused to accept the rise, dropped the rubbermaid product line, rubbermaid filed for bankruptcy, and then the whole production was moved to China and wall-mart signed a distribution deal with the new owners of the moulds.