Back home in Germany, I worked at McDonald's for a while. We, too, have people who don't speak any or little German in our country. At McDonald's, those people worked in the back, cooking food, assembling burgers, that kind of stuff. They only let "actual Germans" work the counter and the drive through.
It might sound awful, but the non-Germans got a paycheck and the whole experience was much less frustrating for the customers than it is over here. Seriously, I usually avoid drivethroughs for that very reason.

And I have to agree with Leed. If you want to work over here, especially in customer service, you should learn to speak the language properly. If you don't want to/can't do that, find a different job that doesn't revolve around talking to customers.

And I think it's simple greed that leads to outsourcing of those jobs to India or whatever. They would make plenty of profit employing people over here. But it's never ENOUGH. It's always, how can we make MORE money? And the customer pays the price, as always.