This is the point, I am not different or special. "White collar workers are all reactionary" is just an inaccurate, unmaterialist statement. They have unions, they strike, they take part in Marxist or anarchist activity. Lenin was a lawyer, Eugene Debs (and Stalin and whoever else) was a newspaper editor and union secretary. Cockshott is a professor.
In Australia, the Financial Services Union (bank employees) is really pretty radical, and they pushed for a royal commission into banking that has had real material effects on regulating and restricting our banking industry, and bringing actual criminal charges against banks and bank execs. Revolutionary activity is everywhere when you look for it. "All the workers by hand and by brain" are united in one class with shared interests.