While Brahmins are "white-collar" pretty much by definition, Vaishyas/yeomanry clearly encompasses both blue-collar and white-collar groups. So I don't think the traditional "blue- vs. white-collar" distinction is quite the same thing as what this article is about.
It's not wrong. But, as always, it projects nothing actionable. What does that blue-collar cohort DO to regain economic well-being?