Some years ago, an acquaintance was going to go with a group to Central America to do repair or construction work at a remote town. The acquaintance was an office worker, and I imagine that most of the rest of the group were office workers also. Now, a pretty large percentage of the construction workers in the metropolitan area are natives of Central America; the whole thing seemed curious to me, though I didn't say anything.

But I suppose it might be for the volunteers to get back into the US than it might have been for a randomly selected group of construction workers. A back problem intervened, and the acquaintance didn't go.