I see this as a problem with several sides. First, I'm no financial expert but it seems to me that inflation is more of the problem for most as wage growth has really not matched the pace of inflation since the 60's based on some studies. While wages have gone up for many, their buying power has shrank in comparison. If the fed didn't pump so much currency into the system effectively devaluing the dollar, then the maybe fast food workers wouldn't need to make 15 dollars an hour.
Second is that when I was in school (I'm 40 now) blue collar jobs were looked at as second class. My family and teachers pushed college and getting a degree, ANY degree, as the ticket to success. After messing up my scholarships my senior year and not really having any direction anyway I chose to follow my fathers advice and learn a trade. I went to work at 18 years old for a non-union industrial electrical contractor making $6.25 an hour in 1998. By age 23 I was making 80k a year working outages and lots of OT. Granted I had no family or kids to worry about so the travel and hours weren't bad, and the money for toys was nice. If only I had been smarter about managing money I'd be retired right now.
As is, by advancing my skills, taking the risks of moving and changing employers I've landed in a nice position for this point in my life where I get the family time I want in between travel and outages and have a salary that allows for my wife to stay at home with the kids and go to school herself. For 2019 my gross income was nearly 150k as a project manager for a small utility, all with no college degree and no student loan debt. Now that I'm focused on finances I'm on track to retirement at age 45 and hope to have a couple side jobs going by then to chase personal passions.
My mom on the other hand went to college after us kids had left the house and got a masters degree then went back for a graduate certificate. As a licensed social worker she has yet to make over $50k a year where she works and now at age 64 still has nearly $70k in student loan debt.
I have contractors working for me that all are struggling to find skilled workers, union and non-union alike. Industrial electrical apprentices at non-union shops here in central Florida are starting in the $15 an hour range and Journeymen in the union can make around $25 plus benefits. These rates are low compared to many locations but still an electrician with a few years experience can easily make $50k a year plus benefits not counting overtime yet the jobs go unfilled. Maintenance electricians at my utility can make mid $30's per hour and gross over $100k per year with overtime, yet these jobs are going unfilled.
As my dad used to always say "Learn a trade cause there's always jobs out there. May not pay what you want or be in the location you want but there's work if your willing to do it."
At the end of the day most of these trades jobs will teach you what you need to learn if people are just wiling to put in the time and effort... It can be hot/ cold at times, dirty at times and have you stressed at times, but if your wiling to put in the work it can be rewarding.