This is a terrible article and the above line confirms that it's essentially collecting some bad anecdotes to paint a broader picture of "tier-1" interns.
My experience with people with difficult majors from top schools is they are workaholics if you pay them good money and give them real projects. If you hire a lacrosse playing English major from an ivy league, and pay substandard wages, don't expect to get the cream of the crop.
Is there a browser plugin that erases Forbes and Medium links from HN?
Disclaimer: I go to UPenn, but that doesn't make this article less of a pile of bullshit.
Again: anecdotal evidence, disregard that I suck bananas, etc.
I don't know what the case is in the US, but in Canada, the government does provide some taxable benefits to the company for hiring interns or people between 18-24. I don't know the specifics, but they do exist.