They're willing to do things you're not willing to do.
Like violate this country's immigration laws, for example. Otherwise, I'll do whatever they're doing, for the right price. They're just willing to work more cheaply than I. And the net effect of that is to import poverty and widen the income gap in this country. Does it give you a warm fuzzy feeling to know you're on the same side as ConAgra and Wal-Mart?
You know what? We already know. We're all blind, we're all evil, we're all hypocrites. Including you. The world is not a comic book. It is a big messy mural in progress, with scenes of horrifying savagery and outstanding beauty. Those of us without personality issues to nurse choose to roll up our sleeves and improve the world one brushstroke at a time, rather than sit back in a battered beanbag of self-satisfaction and fling feces at the easiest targets.