I agree with the author about your manners issue... But also with your logic.
Just because a company makes its employees shareholders and gives them a portion of profits by no means prevents them from being able to reinvest in new technologies. Take the German auto industry, for example, which employs millions of people worldwide. At our local Mercedes (Daimler) factory here in Baden-Württemberg, the employees get a share of the profit each year, often this is equal to a 10K EUR yearly bonus ON TOP of a generous social insurance scheme and retirement package. That's for mechanics, welders and secretaries on the factory floor AND managers, middle-managers and white-collar workers. Pretty much our entire village is employed by Mercedes as blue-collar workers and you see the immediate benefits within our society here.
Mercedes is also one of the world's top investors in electric vehicle development and workshop robotics. Reinvestment doesn't seem to conflict with employee benefits.
In fact, most German companies, which operate under a coordinated-, rather than free-, market system (i.e. with socialist elements brought in after reunification -- until 1991, half the country was socialist) and these companies are some of the most competitive in the world.