Earlier quoted context omitted.
The economy isn't magical either; jobs lost in one region because the factories closed and moved to another aren't necessarily going to be recouped by new job creation in a short span of time.
Then we should probably do what we can to help the worst off in the economy, whether they've lost their jobs due to new technology, moving factories, or whatever, rather than trying to nail the factories down to one particular place.
The problem with this is, the "factory owners" of the world run a political machine which they use to prevent that from happening, claiming it prevents them from building more factories. They use the same political machine to establish the moral goodness of continued factory building as axiomatic.
This makes everything rather complicated.