There was a much better article posted to HN not long ago that did a deeper dive into what's going on:
https://slatestarcodex.com/2018/02/19/technological-unemploy...The overall conclusion was that automation (and, we can assume, globalization) was essentially digging away at "middle-skilled" jobs, like manufacturing. These are jobs where employees must invest a certain amount of time and training to be paid well, and then they find that their entire industry is drying up. They are faced with a few choices, and many of those lead towards a less attractive, lower-paying job than they had before.
With a social safety net, many are simply exiting the job market and relying on disability or other means to get by rather than take a crap job at crap wages.
Although the age group here is different, a lot of the same forces are likely at play. US employers do not see labor as an investment, and haven't for a long time (if ever); they are generally unwilling to hire lower-skilled employees and invest in training them. Instead, they cry constantly that there isn't a large enough pool of skilled labor to draw from (and in the tech sector, this is why they think they need lots of H-1Bs).
Meanwhile, potential employees are faced with a market where, if they work very hard and teach themselves some skill at their own cost, they might be able to get a job working for an employer who will pay them as little as they can get away with paying them (the wage pressure), and potentially also having to pay off student loans. Alternatively, they can forego this rat race and get some middle-skill job -- something between food service and senior software developer -- and make enough to get by, and with less debt, and spend whatever extra money they've got left over on cheap entertainment.
They certainly aren't going to be able to afford a house on their wages, that hasn't been possible since the 60s.
This is a complex issue with manifold causes and effects and, as the article I linked points out, nobody seems to have a solid handle on all of it yet. There's lots of ideology but not clear enough data yet.