Literally hundreds of millions of people in the Third World to were able to raise themselves into the global middle class over the past few decades.

The main people hurt by the outsourcing trend have been middle-class people in wealthy countries who had well-paid, lower-skill jobs producing physical things which are now shipped in from far away.

Good for foreign labor, good for capitalists, and bad for the middle class in rich countries.

This could have even been a win-win-win, if managed more carefully — Germany had pretty robust job retraining programs for people who lost factory jobs. I'd imagine the UK did not.