The problem with this article is that one does not need capital to start a tech company. This very website, sneered at in the article, is littered with examples of people who have built something at the side. I'm not sure knowledge workers can make the same complaints about class struggle that mechanical labourers can. We tend to get more valuable with age and experience.
Knowledge workers are still workers at the end of the day. You have nothing to live off of but your own labor, it is along these lines that your interests align with other workers.