This article keeps asserting its core premise, but never offers any evidence. It cites people who agree with the premise that wealth is underserved, but this is not the same as an argument.

You don't need economic theory to refute an article like this - you simply need to point to reality. Every human need beyond picking wild berries off the trees takes effort to produce. The vast wealth of modern industrial society relies on complex forms of organisation and specialists in discovering and applying knowledge. Anyone's who's built a company, or even advanced in a demanding career, knows that success doesn't just fall in your lap. Beyond a certain point you have to really want to succeed and be willing to put in place the actions that lead to success.