So let's poach these people from the third world and...what about the third world? People can't just be made in factories like robots and self driving cars can. It seems inevitable that either we will have really sucky retirements (please die early grandpa, we can't take care of you!) OR (hopefully) automation will come to the rescue despite luddite protests.
Plenty of people from the third world are interested in moving, trying something new. We should all be free to try new things, but of course you he world isn't set up that way. Seems like we could match up dual needs. The western developed world is in the midst of a racist and fascist period, so not the best time to try this. We have competing changes, shortage of workers in many job areas in the West like the trades in the US, also shortage of jobs for young people in the west.