[vladvasiliu]

Right, but that's because if you live in SF, you need the plumber to physically be in SF. A plumber in [far away, cheap locale] is of no use to you, even if for free.

If this hypothetical plumber had a hypothetical way of traveling to SF for very little money and time, and would hence be able to charge much less than the local plumber, while having the exact same skills, which would you choose, and how much would you pay? If this hypothetical plumber now moved to SF for [reasons], would you pay more for his exact same service?