Unions aren't against technological improvements they're just against how quickly those improvements would be put into place because a LOT of jobs would be lost. If driverless subways for example were phased in as workers retired, I'm sure there wouldn't be a problem. Or if re-training were provided for the workers before they were let go, that might be acceptable as well. It comes down to the fact that humans have to eat and educate their children: machines don't.

Also (as a separate issue) I thought the governments of the world wanted to create more jobs, not fire everyone who is currently working... ;)