Companies start by not having a low-skill, low-wage support staff at all. Then they add it, but they add it locally - in the Bay area, if they're a Bay area company. Eventually, cost wins out and the call center gets moved somewhere cheaper, like a dying Midwest industrial city, or India.

But that sort of move requires a great deal of corporate maturity. It's okay to overspend in the name of short-term convenience when you're still kind of a startup.