[davidw]

> which suggested that the optimal number of immigrants in the U.S. would be two billion.

It suggested no such thing. Please reread it:

"What is the optimal number of imported tomatoes? Soviet central planners tried to figure things out this way. Americans shouldn’t. We should decide on the optimal terms on which tomatoes can be imported, and then let the market decide the number."

[rayiner]

Fair enough, but I don't think there is much of a distinction. The market would just import people wholesale to get the cheapest possible labor. The market hates the islands of civilization built in the sea of entropy. It wants to bring everyone to the global average, which for those fortunate enough to be already in the developed world, is a precipitous drop.