It's true that globalization is raising the average income of people in many places in the world, but it is also causing an increase in inequality within most countries[1]. It's not fair to the middle class of a country when it needs to compete against a country that doesn't have the same environmental or labor laws that it has. This leads to a race to the bottom and tanks the quality of life for most people, though the capital owners get out ahead. Why can't those countries form their own industries?

[1] https://www.imf.org/external/pubs/ft/weo/2007/02/pdf/c4.pdf