Identifying a clearly vested interest and inherent bias in a person defending the system that they personally benefited from is a fairly accepted standard part

Identifying a clearly vested interest and inherent bias in a person defending the system that they personally benefited from is a fairly accepted standard part of critical discourse. Without being critical of the origin of ideas and the interests that lay behind them, you're vulnerable to all sorts of manipulation. Think of the thousands of man hours that can go into producing content you can consume in hours. Regarding the content of the essay, I stopped reading at the straw-man guilt-by-association definition of levellers -- quite clearly an attempt to manipulate.