It is true that the workers of rich countries are “bribed” with less exploitation to pit them against those in or from poor countries. But even their condition can be improved, so it’s possible to build solidarity. I’ve seen it myself.
Ultimately, all value is created by workers and that is where profits are extracted from. If we can foster solidarity with one another, we can force bosses to keep less of our labour as profits.
It’s individualism that is foolish, since it lets the bosses divide us. Collective action is much more effective.