Actually some companies really do recommend overseas employment for staffs. It isn't considered overseas posting because these staffs will have to resign and reapply again when they are there.

I have heard of a friend whose job allows her to network with others in a global scale, and got introduced a job via someone she met at work. She moves over, and took another role in the same MNC she was working in. So, it is not impossible. Sometimes, a referral letter from the companies' GM will suffice.

You don't need to be exceptionally talented to be working in BIG MNCs, sometimes, you only need a lot of luck, help and networking.

People who migrate without job offers are dreamers, I don't think planning realistically is in their plan.