The basic crux of the problem is this. Lets say a company has 100 manufacturing jobs. The company realizes that they can replace 80 of those jobs with automation for faster and cheaper production. The company will need to hire a technical staff to maintain the automation they install. Let's be generous and assume that creates 15 positions. What are the other 65 now jobless employees supposed to do? They can not all become technical staff. The company is not going to lay off 80 manufacturing jobs to save money just to replace them with 80 technical jobs that require further education and thus would command a higher salary, that's farcical.
If more and more companies are doing this, the pool of unemployed former manufacturers is going to continue to grow. Yes, there will be jobs being created in the technical field, but not near enough to keep up with supply. R&D might make a dent, but remember that the next generation still exists, and will be going to school with a better understanding of what positions their generation requires and what will be available to them, so anyone unemployed trying to learn a new tradeskill to keep up with technology is also going to be competing with the next batch fresh out of college.
That leaves the service industry, and you'd be coming in at an entry level position that will not pay enough for you to maintain your expenses. At some point you're going to need to prop up the service employees. And its not "They don't deserve more than X/hour because anybody can be a cashier or flip burgers", its that in an increasingly service and consumer-oriented society and economy, people need to be able to PROVIDE those services and if they can't live off of doing that then why bother? Also fewer and fewer people are going to be able to afford the goods your cheap automated manufacturing is producing.
Long term its an unsustainable system in that form unless people can get off their high horse and realize providing a better wage for service employees is not to "devalue" your education but to sustain your economy and country rather than risk the whole thing collapsing.
I was having a similar discussion with a co-worker and I asked them if they had to pick, would they rather their grandchildren be wealthy or Americans? If you want to say wealthy that's fine, its your prerogative, but then you don't get to wave some patriotic bullshit in my face if some $ amount is more important to you than the long-term survival of your country. That's the common sentiment though. No more "Ask not what your country can do for you, ask what you can do for your country", its now "I'm gonna get mine, and if you don't well fuck you that's too bad" and that's not a healthy mindset for a nation.