Annoying part is turning them has been a key factor in most successful revolutions, if only because they are a highly educated demographic in a unique position to know how the system actually works better than the politicians, nobility, and capitalists they serve. Unlike the rabid petite bourgeoisie, the professional managerial class is a tool. Ironically once they accept a new paradigm, most get back to work because professionally being a highly educated tool is their thing whether it be for capitalists or communists.
Professional-Managerial Class
The layers of "buffer" class between the actual bourgeoisie and proles at the bottom. Their jobs being dependent on their performance in placating the proles and keeping them in line, makes them throw their lot in with the bourgeoisie more often than not.
They also serve an ideological apologetics role in giving the meritocracy veneer to capitalism. The illusion that the political economy isn’t about capitalists extracting surplus value but rather ensuring “the most qualified people” are running things.