For India they culturally value different skills and roles. They value pair programming and treat great ideas from juniors as a negative. Japan has a different work culture that doesn't fit the open model in the west.
The issue in the EU is local EU companies don't pay as well because they don't have to (little competition). And a culture of not paying high salaries but paying higher taxes.
Which to be clear: is not happening.
They're buying very low cost labor and are hoping to power through it for some sweet juicy numbers.