At the cost of a buck an hour or less for wages, you can afford to spend a LOT of money on debugging and still come out way ahead. That's what companies have realized about offshoring: the negatives of distance, control, communications, culture and other difficulties are offset 100 fold by the savings on labor. If you have to hire TEN times as many people, you still are far ahead.
For example, if a Bangalore call center agent angers a customer of a computer company---say the customer is mad at the difficulty in communicating, or at the agent's intransigence in sticking to a script that may not apply, or the agent's arrogance---and the customer doesn't buy a computer from them again, the loss of that customer's business is offset many times over by the savings in using the Indian call center. The computer company saved more on the labor of that one call center agent in one day than their typical margin on the sales of the several computers the caller may have purchased from them the rest of his lifetime!
And as far into the future as one can imagine, there is a never ending supply of workers willing to work for pennies a day. An endless tide of cheap labor that can do every job in America that is done on a computer, at a desk, or basically just sitting down. Anything that can be packaged and shipped can be purchsed from, returned to, repaired by, and maintained by someone who will work for 1/20th or less of what an average American earns.