Because the technology industry depends on a lot of idealistic young workers putting in plenty of unpaid overtime, and no one ever motivated that commitment with a call to increase shareholder returns by 17%.
Or they need to feed their family.
Seeings as a lot (MOST!) developers are not "rock stars" by any stretch of the imagination, don't make that much, and some are not willing to relocate to another state/city.
Startups will categorically enfeeble more people than any war. And we'll do it in the name of GTD and competition with our own machines.