Again, I note that this was back when we were economically capable of making the transition and making sure that Americans who had spend their lives learning one trade could still support themselves while they transitioned to a new trade.
It's not a matter of our not being economically capable of fixing such problems. It's about being politically capable. The fact is, fixing the underclass is against Democrat interests. They need an underclass (and victim classes in general) to justify their existence. That's why they consistently block efforts to promote economic growth.