It's location specific. It hurts the lower and middle classes workers in developed countries and helps almost everyone else.
Utra cheap Wal-Mart goods are great if you are retired and living on a small retirement. Or worked in a non factory job in the first place.
A soul crushing factory job is still better than manual farm work in a developing country. Those same factory workers add a lot more income for local economies in developing nations.
It also tends to harm farmers in developing nations. But, that's largely from first world farming subsidies.
PS: After China replaces those workers with robots they will be poor in a developed nation which is generally a lot better than being poor in a poor nation.
The factory jobs will go away in China soon too and those workers will be out of a job again. As long as the capitalists suck up all gains any improvements for poor people will be temporary until they get replaced by even cheaper workers or robots.
Maybe once doctors' and lawyers' work gets automated then things will change since the political class is mainly lawyers.
It hurts developing countries too, e.g. no incentive to give people a good education for free if you'll just lose them to brain drain. Globalization allows the best workers worldwide to spend their time solving the most profitable problems, i.e. rich people problems.
That brain drain also tends to remit a lot of money back to the developing country. Even without family in the area many people spend 10-20 years in the west then go back with significant capital.
Utra cheap Wal-Mart goods are great if you are retired and living on a small retirement. Or worked in a non factory job in the first place.
A soul crushing factory job is still better than manual farm work in a developing country. Those same factory workers add a lot more income for local economies in developing nations.
It also tends to harm farmers in developing nations. But, that's largely from first world farming subsidies.
PS: After China replaces those workers with robots they will be poor in a developed nation which is generally a lot better than being poor in a poor nation.