who are intellectually capable, sufficiently driven, sufficiently confident, sufficiently focused, sufficiently willing to put in the effort, to rise from the "lower class" to the "middle class"? And what do you think is the most important ingredient in being able to make that move?
The most important ingredient you ask? How about the availability of jobs paying middle class wages.
But we are not going to be building a larger middle class anytime soon.
What we will have is an upper class, a tradesman class (formerly known as the middle class) and then there will be the rest of the Americans. Getting by the best they can.
Unless they learn a trade or get enough of the right education to move to the upper class. And good luck with that.
But it won't be so bad. This division has existed before. Actually much longer than the idea the everyone can pull themselves up to the next level.